Update functions-compat dep version and fix changeset script error (#4032)

Author: hsubox76

.changeset/config.json

@@ -15,6 +15,7 @@
     "@firebase/auth-exp",
     "@firebase/auth-compat",
     "@firebase/auth-types-exp",
+    "@firebase/functions-compat",
     "@firebase/functions-exp",
     "@firebase/functions-types-exp",
     "@firebase/installations-exp",

packages-exp/functions-compat/package.json

@@ -20,7 +20,7 @@
     "rollup": "2.29.0",
     "@rollup/plugin-json": "4.1.0",
     "rollup-plugin-typescript2": "0.27.3",
-    "typescript": "4.0.2"
+    "typescript": "4.0.5"
   },
   "repository": {
     "directory": "packages-exp/functions-compat",

scripts/check_changeset.ts

@@ -112,9 +112,7 @@ async function main() {
   }
   try {
     const diffData = await getDiffData();
-    if (diffData == null) {
-      process.exit();
-    } else {
+    if (diffData != null) {
       const { changedPackages, changesetFile } = diffData;
       const changesetPackages = await parseChangesetFile(changesetFile);
       const missingPackages = [...changedPackages].filter(