increased min sdk version to 2.2.2

pubspec.yaml

@@ -14,7 +14,7 @@ description: ente photos application
 version: 0.0.20+20
 
 environment:
-  sdk: ">=2.1.0 <3.0.0"
+  sdk: ">=2.2.2 <3.0.0"
 
 dependencies:
   flutter:
@@ -91,30 +91,26 @@ flutter:
   assets:
     - assets/
   fonts:
-  - family: NunitoSans
-    fonts:
-      - asset: fonts/NunitoSans-Regular.ttf
-      - asset: fonts/NunitoSans-Bold.ttf
-  - family: Montserrat
-    fonts:
-      - asset: fonts/Montserrat-Medium.ttf
+    - family: NunitoSans
+      fonts:
+        - asset: fonts/NunitoSans-Regular.ttf
+        - asset: fonts/NunitoSans-Bold.ttf
+    - family: Montserrat
+      fonts:
+        - asset: fonts/Montserrat-Medium.ttf
 
   # The following line ensures that the Material Icons font is
   # included with your application, so that you can use the icons in
   # the material Icons class.
   uses-material-design: true
-
   # To add assets to your application, add an assets section, like this:
   # assets:
   #  - images/a_dot_burr.jpeg
   #  - images/a_dot_ham.jpeg
-
   # An image asset can refer to one or more resolution-specific "variants", see
   # https://flutter.dev/assets-and-images/#resolution-aware.
-
   # For details regarding adding assets from package dependencies, see
   # https://flutter.dev/assets-and-images/#from-packages
-
   # To add custom fonts to your application, add a fonts section here,
   # in this "flutter" section. Each entry in this list should have a
   # "family" key with the font family name, and a "fonts" key with a