fix Android compilation

android/build.gradle

@@ -42,3 +42,4 @@ subprojects {
 task clean(type: Delete) {
     delete rootProject.buildDir
 }
+

android/gradle.properties

@@ -1,3 +1,4 @@
 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
-android.enableJetifier=true
+android.enableJetifier=true
+android.enableR8=true

pubspec.lock

@@ -14,7 +14,7 @@ packages:
       name: analyzer_plugin
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.0"
+    version: "0.2.1"
   archive:
     dependency: transitive
     description:
@@ -49,7 +49,7 @@ packages:
       name: build
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.6"
+    version: "1.2.0"
   build_config:
     dependency: transitive
     description:
@@ -70,21 +70,21 @@ packages:
       name: build_resolvers
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.7"
+    version: "1.1.1"
   build_runner:
     dependency: "direct dev"
     description:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.7.1"
   build_runner_core:
     dependency: transitive
     description:
       name: build_runner_core
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.0.0"
+    version: "4.1.0"
   built_collection:
     dependency: "direct main"
     description:
@@ -126,7 +126,7 @@ packages:
       name: cloud_firestore
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.9+4"
+    version: "0.12.9+5"
   code_builder:
     dependency: transitive
     description:
@@ -210,7 +210,7 @@ packages:
       name: firebase_messaging
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "5.1.5"
+    version: "5.1.6"
   firebase_storage:
     dependency: "direct main"
     description:
@@ -264,7 +264,7 @@ packages:
       name: flutter_platform_widgets
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.0"
+    version: "0.20.2"
   flutter_redux:
     dependency: "direct main"
     description:
@@ -311,7 +311,7 @@ packages:
       name: html
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.14.0+2"
+    version: "0.14.0+3"
   http:
     dependency: transitive
     description:
@@ -353,7 +353,7 @@ packages:
       name: intl
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.15.8"
+    version: "0.16.0"
   io:
     dependency: transitive
     description:
@@ -682,7 +682,7 @@ packages:
       name: url_launcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "5.1.3"
+    version: "5.1.6"
   vector_math:
     dependency: transitive
     description:
@@ -710,7 +710,7 @@ packages:
       name: web_socket_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.15"
+    version: "1.1.0"
   xml:
     dependency: transitive
     description:
@@ -724,7 +724,7 @@ packages:
       name: yaml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.16"
+    version: "2.2.0"
 sdks:
   dart: ">=2.4.0 <3.0.0"
-  flutter: ">=1.5.0 <2.0.0"
+  flutter: ">=1.9.1 <2.0.0"

pubspec.yaml

@@ -50,7 +50,7 @@ dependencies:
       ref: fix/ios_compression
 
   pinch_zoom_image: ^0.2.5
-  flutter_platform_widgets: ^0.12.0
+  flutter_platform_widgets: ^0.20.2
 
   flutter_linkify: ^2.1.0
   url_launcher: ^5.0.3