Update dependencies and check-in pubspec.lock

We want to make sure the CI is testing the exact same version
we are releasing to the public. Lock the dependencies to make
error reproduction more reliable.

Author: tmpsantos

.github/workflows/main.yml

@@ -21,7 +21,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          dart pub get
+          dart pub get --enforce-lockfile
 
       - name: Analyze code
         run: |
@@ -51,7 +51,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          dart pub get
+          dart pub get --enforce-lockfile
 
       - name: Build
         run: |

.gitignore

@@ -1,2 +1,2 @@
+bin/flutterflow
 .dart_tool/
-pubspec.lock