Fix MIEQ failure against Emulator on CI (#7637)

Author: milaGGL

.github/workflows/test-changed-firestore.yml

@@ -118,6 +118,8 @@ jobs:
         run: cp config/ci.config.json config/project.json
       - name: Run tests
         run: cd packages/firestore && yarn run ${{ matrix.test-name }}
+        env:
+          EXPERIMENTAL_MODE: true
 
   compat-test-firefox:
     name: Test Firestore Compatible on Firefox
@@ -185,6 +187,7 @@ jobs:
         run: cd packages/firestore && xvfb-run yarn run ${{ matrix.test-name }}
         env:
           BROWSERS: 'Firefox'
+          EXPERIMENTAL_MODE: true
 
   # A job that fails if any required job in the test matrix fails,
   # to be used as a required check for merging.

scripts/emulator-testing/emulators/firestore-emulator.ts

@@ -22,11 +22,11 @@ export class FirestoreEmulator extends Emulator {
 
   constructor(port: number, projectId = 'test-emulator') {
     super(
-      'cloud-firestore-emulator-v1.14.4.jar',
+      'cloud-firestore-emulator-v1.18.1.jar',
       // Use locked version of emulator for test to be deterministic.
       // The latest version can be found from firestore emulator doc:
       // https://firebase.google.com/docs/firestore/security/test-rules-emulator
-      'https://storage.googleapis.com/firebase-preview-drop/emulator/cloud-firestore-emulator-v1.14.4.jar',
+      'https://storage.googleapis.com/firebase-preview-drop/emulator/cloud-firestore-emulator-v1.18.1.jar',
       port
     );
     this.projectId = projectId;