fixed min sdk for android

android/src/main/AndroidManifest.xml

@@ -1,7 +1,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
           xmlns:tools="http://schemas.android.com/tools"
           package="com.flutter_webview_plugin">
-    <uses-sdk android:minSdkVersion="16" />
     <application>
         <provider
             android:name="androidx.core.content.FileProvider"

example/ios/Flutter/flutter_export_environment.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+# This is a generated file; do not edit or check into version control.
+export "FLUTTER_ROOT=/Users/rafal.wachol/Utils/flutter"
+export "FLUTTER_APPLICATION_PATH=/Users/rafal.wachol/Utils/github/flutter_webview_plugin/example"
+export "FLUTTER_TARGET=lib/main.dart"
+export "FLUTTER_BUILD_DIR=build"
+export "SYMROOT=${SOURCE_ROOT}/../build/ios"
+export "FLUTTER_FRAMEWORK_DIR=/Users/rafal.wachol/Utils/flutter/bin/cache/artifacts/engine/ios"