Inline changeset-{version,publish}.ts into workflow.

These scripts seem to have no purpose except to run shell commands. We can just run the shell commands directly from the shell. This removes a layer of indirection, making it easier to see what's going on.

Author: kentonv

.github/changeset-publish.ts

@@ -39,8 +39,12 @@ jobs:
       - id: changesets
         uses: changesets/action@v1
         with:
-          version: npx tsx .github/changeset-version.ts
-          publish: npx tsx .github/changeset-publish.ts
+          # The standard step is only to run `changeset version` but this does not update the
+          # package-lock.json file. So we also run `npm install`, which does this update.
+          # This is a workaround until this is handled automatically by `changeset version`.
+          # See https://github.com/changesets/changesets/issues/421.
+          version: npx changeset version && npm install
+          publish: npx changeset publish
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}