Update the Unity versions being used (#296)

* Pin the u3d version to 1.2.3

* Try changing the Unity version instead

* Undo u3d pin, and update Unity versions

* comment `u3d available -u 2019 -p` 

comment `u3d available -u 2019 -p` which causing issue: https://github.com/firebase/firebase-unity-sdk/runs/6478842808?check_suite_focus=true#step:3:440

Co-authored-by: Mou Sun <69009538+sunmou99@users.noreply.github.com>

Author: a-maurice

.github/workflows/integration_tests.yml

@@ -218,7 +218,7 @@ jobs:
         run: |
           gem install u3d
           u3d available
-          u3d available -u ${{ matrix.unity_version }} -p
+          # u3d available -u ${{ matrix.unity_version }} -p
       - name: Setup python
         uses: actions/setup-python@v2
         with:

scripts/gha/print_matrix_configuration.py

@@ -81,12 +81,12 @@
 UNITY_SETTINGS = {
   "2020": {
     _WINDOWS: {
-      "version": "2020.3.22f1",
+      "version": "2020.3.34f1",
       "packages": {"Default": ["Unity"], "Android": ["Android"], "iOS": ["Ios"], "Windows": None, "macOS": ["Mac-mono"], "Linux": ["Linux-mono"]},
       "ndk": "https://dl.google.com/android/repository/android-ndk-r19-windows-x86_64.zip"
     },
     _MACOS: {
-      "version": "2020.3.22f1",
+      "version": "2020.3.34f1",
       "packages": {"Default": ["Unity"], "Android": ["Android"], "iOS": ["Ios"], "Windows": ["Windows-mono"], "macOS": None, "Linux": ["Linux-mono"]},
       "ndk": "https://dl.google.com/android/repository/android-ndk-r19-darwin-x86_64.zip"
     },
@@ -97,12 +97,12 @@
   },
   "2019": {
     _WINDOWS: {
-      "version": "2019.4.32f1",
+      "version": "2019.4.39f1",
       "packages": {"Default": ["Unity"], "Android": ["Android"], "iOS": ["Ios"], "Windows": None, "macOS": ["Mac-mono"], "Linux": ["Linux-mono"]},
       "ndk": "https://dl.google.com/android/repository/android-ndk-r19-windows-x86_64.zip"
     },
     _MACOS: {
-      "version": "2019.4.32f1",
+      "version": "2019.4.39f1",
       "packages": {"Default": ["Unity"], "Android": ["Android"], "iOS": ["Ios"], "Windows": ["Windows-mono"], "macOS": None, "Linux": ["Linux-mono"]},
       "ndk": "https://dl.google.com/android/repository/android-ndk-r19-darwin-x86_64.zip"
     },