Update license field

Author: mskelton

.github/workflows/format.yml

@@ -1,7 +1,7 @@
 name: Format
 on:
   pull_request:
-    branches: [master]
+    branches: [main]
 jobs:
   format:
     runs-on: ubuntu-latest

README.md

@@ -1,6 +1,6 @@
 # VS Code npm Outdated
 
-[![Build status](https://img.shields.io/github/workflow/status/mskelton/vscode-npm-outdated/Release/master.svg?logo=github)](https://github.com/mskelton/vscode-npm-outdated/actions?query=workflow%3ARelease)
+[![Build status](https://img.shields.io/github/workflow/status/mskelton/vscode-npm-outdated/Release/main.svg?logo=github)](https://github.com/mskelton/vscode-npm-outdated/actions?query=workflow%3ARelease)
 [![All Contributors](https://img.shields.io/github/all-contributors/mskelton/vscode-npm-outdated?color=orange)](#contributors-)
 [![Semantic release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 

package.json

@@ -13,7 +13,7 @@
     "url": "https://github.com/mskelton/vscode-npm-outdated/issues"
   },
   "homepage": "https://github.com/mskelton/vscode-npm-outdated#readme",
-  "license": "MIT",
+  "license": "ISC",
   "keywords": [
     "npm",
     "vscode-extension",