Merge branch 'updateFlutter' into 'master'

Update flutter package

See merge request !19

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=0.0.16
-app.versionCode=16
+app.versionName=0.0.17
+app.versionCode=17

pubspec.lock

@@ -66,7 +66,7 @@ packages:
       name: http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.13.1"
+    version: "0.13.2"
   http_parser:
     dependency: transitive
     description: