publish as v9 prerelease

Author: Feiyang1

packages-exp/firebase-exp/package.json

@@ -1,6 +1,6 @@
 {
   "name": "firebase-exp",
-  "version": "0.900.20",
+  "version": "9.0.0-beta.0",
   "private": true,
   "description": "Firebase JavaScript library for web and Node.js",
   "author": "Firebase <[email protected]> (https://firebase.google.com/)",

scripts/exp/release.ts

@@ -343,9 +343,9 @@ async function getNewVersions(packagePaths: string[]) {
   for (const path of packagePaths) {
     const { version, name } = await readPackageJson(path);
 
-    // increment firebase-exp's patch version
+    // increment firebase-exp as a v9 prerelease, e.g. 9.0.0-beta.0 -> 9.0.0-beta.1
     if (name === FIREBASE_UMBRELLA_PACKAGE_NAME) {
-      const nextVersion = inc(version, 'patch');
+      const nextVersion = inc(version, 'prerelease');
       versions.set(name, nextVersion);
     } else {
       // create individual packages version