bump version to 84

revert the git background task

Author: zeapo

app/build.gradle

@@ -9,26 +9,22 @@ android {
         applicationId "com.zeapo.pwdstore"
         minSdkVersion 15
         targetSdkVersion 25
-        versionCode 83
-        versionName "1.2.0.63"
+        versionCode 84
+        versionName "1.2.0.64"
     }
-
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_7
         targetCompatibility JavaVersion.VERSION_1_7
     }
-
     // avoid Travis failures
     lintOptions {
         abortOnError false
     }
-
     packagingOptions {
         exclude '.readme'
         exclude 'META-INF/LICENSE.txt'
         exclude 'META-INF/NOTICE.txt'
     }
-
     //
     // To sign release builds, create the file `gradle.properties` in
     // $HOME/.gradle or in your project directory with this content: