Update gradles and dependencies

Author: TacoTheDank

app/build.gradle

@@ -1,33 +1,34 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion "27.0.3"
-
+    compileSdkVersion 28
+    buildToolsVersion "29.0.3"
 
     defaultConfig {
         applicationId "com.phikal.regex"
         minSdkVersion 16
-        targetSdkVersion 24
+        targetSdkVersion 28
         versionCode 5
         versionName "1.3.1"
     }
+
     buildTypes {
         release {
             minifyEnabled true
-            shrinkResources true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+
+    lintOptions {
+        disable 'GoogleAppIndexingWarning'
+    }
 }
 
 dependencies {
-    implementation fileTree(include: ['*.jar'], dir: 'libs')
-    implementation 'com.android.support:appcompat-v7:25.3.1'
-    implementation 'com.android.support:design:25.3.1'
-    implementation 'com.android.support:support-v4:25.3.1'
+    implementation 'com.android.support:support-v4:28.0.0'
 }

app/proguard-rules.pro

@@ -2,17 +2,25 @@
 
 buildscript {
     repositories {
-        jcenter()
         google()
+        jcenter()
     }
+
     dependencies {
         classpath 'com.android.tools.build:gradle:3.6.3'
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
     }
 }
 
 allprojects {
     repositories {
-        jcenter()
         google()
+        jcenter()
     }
 }
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}