Convert file to js, avoid yarn install

Author: hsubox76

.github/workflows/check-changeset.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Yarn install
       run: yarn
     - name: Run changeset script
-      run: yarn ts-node-script scripts/check_changeset.ts
+      run: node scripts/check_changeset.js
       id: check-changeset
     - name: Read output
       run: echo env.MISSING_PACKAGES

scripts/check_changeset.ts renamed to scripts/check_changeset.js

@@ -27,14 +27,11 @@ const git = simpleGit(root);
 /**
  * Identify modified packages.
  */
-async function getDiffData(): Promise<{
-  changedPackages: string[];
-  changesetFile: string;
-} | null> {
+async function getDiffData() {
   const diff = await git.diff(['--name-only', 'origin/master...HEAD']);
   const changedFiles = diff.split('\n');
   let changesetFile = '';
-  const changedPackagesMap: { [key: string]: boolean } = {};
+  const changedPackagesMap = {};
   for (const filename of changedFiles) {
     // Check for an existing .changeset
     const changesetMatch = filename.match(/^\.changeset\/[a-zA-Z-]+\.md/);
@@ -61,8 +58,8 @@ async function getDiffData(): Promise<{
   return { changedPackages: Object.keys(changedPackagesMap), changesetFile };
 }
 
-async function parseChangesetFile(changesetFile: string) {
-  const fileText: string = await fs.readFile(changesetFile, 'utf8');
+async function parseChangesetFile(changesetFile) {
+  const fileText = await fs.readFile(changesetFile, 'utf8');
   const fileParts = fileText.split('---\n');
   const packageLines = fileParts[1].split('\n');
   const changesetPackages = packageLines