diff --git a/package-lock.json b/package-lock.json
index 9263acf..3357081 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -20,7 +20,7 @@
         "eslint-plugin-jest": "^23.20.0",
         "jest": "^24.9.0",
         "jest-circus": "^26.4.2",
-        "js-yaml": "^3.14.0",
+        "js-yaml": "^4.1.1",
         "prettier": "2.1.1",
         "ts-jest": "^24.3.0",
         "typescript": "^4.1.3"
@@ -521,6 +521,28 @@
         "node": "^10.12.0 || >=12.0.0"
       }
     },
+    "node_modules/@eslint/eslintrc/node_modules/argparse": {
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
+      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
+      "dev": true,
+      "dependencies": {
+        "sprintf-js": "~1.0.2"
+      }
+    },
+    "node_modules/@eslint/eslintrc/node_modules/js-yaml": {
+      "version": "3.14.2",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.2.tgz",
+      "integrity": "sha512-PMSmkqxr106Xa156c2M265Z+FTrPl+oxd/rgOQy2tijQeK5TxQ43psO1ZCwhVOSdnn+RzkzlRz/eY4BgJBYVpg==",
+      "dev": true,
+      "dependencies": {
+        "argparse": "^1.0.7",
+        "esprima": "^4.0.0"
+      },
+      "bin": {
+        "js-yaml": "bin/js-yaml.js"
+      }
+    },
     "node_modules/@istanbuljs/load-nyc-config": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/@istanbuljs/load-nyc-config/-/load-nyc-config-1.1.0.tgz",
@@ -537,6 +559,15 @@
         "node": ">=8"
       }
     },
+    "node_modules/@istanbuljs/load-nyc-config/node_modules/argparse": {
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
+      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
+      "dev": true,
+      "dependencies": {
+        "sprintf-js": "~1.0.2"
+      }
+    },
     "node_modules/@istanbuljs/load-nyc-config/node_modules/find-up": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/find-up/-/find-up-4.1.0.tgz",
@@ -550,6 +581,19 @@
         "node": ">=8"
       }
     },
+    "node_modules/@istanbuljs/load-nyc-config/node_modules/js-yaml": {
+      "version": "3.14.2",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.2.tgz",
+      "integrity": "sha512-PMSmkqxr106Xa156c2M265Z+FTrPl+oxd/rgOQy2tijQeK5TxQ43psO1ZCwhVOSdnn+RzkzlRz/eY4BgJBYVpg==",
+      "dev": true,
+      "dependencies": {
+        "argparse": "^1.0.7",
+        "esprima": "^4.0.0"
+      },
+      "bin": {
+        "js-yaml": "bin/js-yaml.js"
+      }
+    },
     "node_modules/@istanbuljs/load-nyc-config/node_modules/locate-path": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-5.0.0.tgz",
@@ -3729,13 +3773,10 @@
       }
     },
     "node_modules/argparse": {
-      "version": "1.0.10",
-      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
-      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
-      "dev": true,
-      "dependencies": {
-        "sprintf-js": "~1.0.2"
-      }
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
+      "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==",
+      "dev": true
     },
     "node_modules/arr-diff": {
       "version": "4.0.0",
@@ -4875,8 +4916,7 @@
         "esprima": "^4.0.1",
         "estraverse": "^4.2.0",
         "esutils": "^2.0.2",
-        "optionator": "^0.8.1",
-        "source-map": "~0.6.1"
+        "optionator": "^0.8.1"
       },
       "bin": {
         "escodegen": "bin/escodegen.js",
@@ -5324,6 +5364,28 @@
         "node": ">=10"
       }
     },
+    "node_modules/eslint/node_modules/argparse": {
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
+      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
+      "dev": true,
+      "dependencies": {
+        "sprintf-js": "~1.0.2"
+      }
+    },
+    "node_modules/eslint/node_modules/js-yaml": {
+      "version": "3.14.2",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.2.tgz",
+      "integrity": "sha512-PMSmkqxr106Xa156c2M265Z+FTrPl+oxd/rgOQy2tijQeK5TxQ43psO1ZCwhVOSdnn+RzkzlRz/eY4BgJBYVpg==",
+      "dev": true,
+      "dependencies": {
+        "argparse": "^1.0.7",
+        "esprima": "^4.0.0"
+      },
+      "bin": {
+        "js-yaml": "bin/js-yaml.js"
+      }
+    },
     "node_modules/espree": {
       "version": "7.3.1",
       "resolved": "https://registry.npmjs.org/espree/-/espree-7.3.1.tgz",
@@ -8627,7 +8689,6 @@
         "@jest/types": "^24.9.0",
         "anymatch": "^2.0.0",
         "fb-watchman": "^2.0.0",
-        "fsevents": "^1.2.7",
         "graceful-fs": "^4.1.15",
         "invariant": "^2.2.4",
         "jest-serializer": "^24.9.0",
@@ -10728,7 +10789,6 @@
         "@types/node": "*",
         "anymatch": "^3.0.3",
         "fb-watchman": "^2.0.0",
-        "fsevents": "^2.1.2",
         "graceful-fs": "^4.2.4",
         "jest-regex-util": "^26.0.0",
         "jest-serializer": "^26.6.2",
@@ -11557,7 +11617,6 @@
         "@types/node": "*",
         "anymatch": "^3.0.3",
         "fb-watchman": "^2.0.0",
-        "fsevents": "^2.1.2",
         "graceful-fs": "^4.2.4",
         "jest-regex-util": "^26.0.0",
         "jest-serializer": "^26.6.2",
@@ -12118,7 +12177,6 @@
         "@types/node": "*",
         "anymatch": "^3.0.3",
         "fb-watchman": "^2.0.0",
-        "fsevents": "^2.1.2",
         "graceful-fs": "^4.2.4",
         "jest-regex-util": "^26.0.0",
         "jest-serializer": "^26.6.2",
@@ -12910,13 +12968,12 @@
       "dev": true
     },
     "node_modules/js-yaml": {
-      "version": "3.14.1",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.1.tgz",
-      "integrity": "sha512-okMH7OXXJ7YrN9Ok3/SXrnu4iX9yOk+25nqX4imS2npuvTYDmo/QEZoqwZkYaIDk3jVvBOTOIEgEhaLOynBS9g==",
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.1.1.tgz",
+      "integrity": "sha512-qQKT4zQxXl8lLwBtHMWwaTcGfFOZviOJet3Oy/xmGk2gZH677CJM9EvtfdSkgWcATZhj/55JZ0rmy3myCT5lsA==",
       "dev": true,
       "dependencies": {
-        "argparse": "^1.0.7",
-        "esprima": "^4.0.0"
+        "argparse": "^2.0.1"
       },
       "bin": {
         "js-yaml": "bin/js-yaml.js"
@@ -15081,7 +15138,7 @@
     "node_modules/sprintf-js": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
-      "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=",
+      "integrity": "sha512-D9cPgkvLlV3t3IzL0D0YLvGA9Ahk4PcvVwUbN0dSGr1aP0Nrt4AEnTUbuGvquEC0mA64Gqt1fzirlRs5ibXx8g==",
       "dev": true
     },
     "node_modules/sshpk": {
@@ -16648,6 +16705,27 @@
         "lodash": "^4.17.19",
         "minimatch": "^3.0.4",
         "strip-json-comments": "^3.1.1"
+      },
+      "dependencies": {
+        "argparse": {
+          "version": "1.0.10",
+          "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
+          "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
+          "dev": true,
+          "requires": {
+            "sprintf-js": "~1.0.2"
+          }
+        },
+        "js-yaml": {
+          "version": "3.14.2",
+          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.2.tgz",
+          "integrity": "sha512-PMSmkqxr106Xa156c2M265Z+FTrPl+oxd/rgOQy2tijQeK5TxQ43psO1ZCwhVOSdnn+RzkzlRz/eY4BgJBYVpg==",
+          "dev": true,
+          "requires": {
+            "argparse": "^1.0.7",
+            "esprima": "^4.0.0"
+          }
+        }
       }
     },
     "@istanbuljs/load-nyc-config": {
@@ -16663,6 +16741,15 @@
         "resolve-from": "^5.0.0"
       },
       "dependencies": {
+        "argparse": {
+          "version": "1.0.10",
+          "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
+          "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
+          "dev": true,
+          "requires": {
+            "sprintf-js": "~1.0.2"
+          }
+        },
         "find-up": {
           "version": "4.1.0",
           "resolved": "https://registry.npmjs.org/find-up/-/find-up-4.1.0.tgz",
@@ -16673,6 +16760,16 @@
             "path-exists": "^4.0.0"
           }
         },
+        "js-yaml": {
+          "version": "3.14.2",
+          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.2.tgz",
+          "integrity": "sha512-PMSmkqxr106Xa156c2M265Z+FTrPl+oxd/rgOQy2tijQeK5TxQ43psO1ZCwhVOSdnn+RzkzlRz/eY4BgJBYVpg==",
+          "dev": true,
+          "requires": {
+            "argparse": "^1.0.7",
+            "esprima": "^4.0.0"
+          }
+        },
         "locate-path": {
           "version": "5.0.0",
           "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-5.0.0.tgz",
@@ -19247,13 +19344,10 @@
       }
     },
     "argparse": {
-      "version": "1.0.10",
-      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
-      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
-      "dev": true,
-      "requires": {
-        "sprintf-js": "~1.0.2"
-      }
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
+      "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==",
+      "dev": true
     },
     "arr-diff": {
       "version": "4.0.0",
@@ -20270,6 +20364,27 @@
         "table": "^5.2.3",
         "text-table": "^0.2.0",
         "v8-compile-cache": "^2.0.3"
+      },
+      "dependencies": {
+        "argparse": {
+          "version": "1.0.10",
+          "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
+          "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
+          "dev": true,
+          "requires": {
+            "sprintf-js": "~1.0.2"
+          }
+        },
+        "js-yaml": {
+          "version": "3.14.2",
+          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.2.tgz",
+          "integrity": "sha512-PMSmkqxr106Xa156c2M265Z+FTrPl+oxd/rgOQy2tijQeK5TxQ43psO1ZCwhVOSdnn+RzkzlRz/eY4BgJBYVpg==",
+          "dev": true,
+          "requires": {
+            "argparse": "^1.0.7",
+            "esprima": "^4.0.0"
+          }
+        }
       }
     },
     "eslint-config-prettier": {
@@ -26596,13 +26711,12 @@
       "dev": true
     },
     "js-yaml": {
-      "version": "3.14.1",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.1.tgz",
-      "integrity": "sha512-okMH7OXXJ7YrN9Ok3/SXrnu4iX9yOk+25nqX4imS2npuvTYDmo/QEZoqwZkYaIDk3jVvBOTOIEgEhaLOynBS9g==",
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.1.1.tgz",
+      "integrity": "sha512-qQKT4zQxXl8lLwBtHMWwaTcGfFOZviOJet3Oy/xmGk2gZH677CJM9EvtfdSkgWcATZhj/55JZ0rmy3myCT5lsA==",
       "dev": true,
       "requires": {
-        "argparse": "^1.0.7",
-        "esprima": "^4.0.0"
+        "argparse": "^2.0.1"
       }
     },
     "jsbn": {
@@ -28317,7 +28431,7 @@
     "sprintf-js": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
-      "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=",
+      "integrity": "sha512-D9cPgkvLlV3t3IzL0D0YLvGA9Ahk4PcvVwUbN0dSGr1aP0Nrt4AEnTUbuGvquEC0mA64Gqt1fzirlRs5ibXx8g==",
       "dev": true
     },
     "sshpk": {
diff --git a/package.json b/package.json
index 0075365..2b8fba2 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "eslint-plugin-jest": "^23.20.0",
     "jest": "^24.9.0",
     "jest-circus": "^26.4.2",
-    "js-yaml": "^3.14.0",
+    "js-yaml": "^4.1.1",
     "prettier": "2.1.1",
     "ts-jest": "^24.3.0",
     "typescript": "^4.1.3"