Update dependency react-scripts to v2.1.8 (#205)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

pdf-preview-react/package.json

@@ -6,7 +6,7 @@
     "react": "^16.7.0",
     "react-dom": "^16.7.0",
     "react-pdf": "^7.7.3",
-    "react-scripts": "2.1.3",
+    "react-scripts": "2.1.8",
     "semantic-ui-css": "^2.4.1",
     "semantic-ui-react": "^0.85.0"
   },