Update library versions

app/build.gradle

 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 27
     buildToolsVersion '27.0.3'
     defaultConfig {
         applicationId "in.ac.iitb.gymkhana.iitbapp"
         manifestPlaceholders 'appAuthRedirectScheme': 'https'
         minSdkVersion 17
-        targetSdkVersion 26
+        targetSdkVersion 27
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
@@ -22,20 +22,19 @@ android {
 }
 
 ext {
-    supportLibVersion = '26.1.0'
-    playServicesVersion = '12.0.0'
+    supportLibVersion = '27.1.1'
+    playServicesVersion = '15.0.1'
     butterKnifeVersion = '8.8.1'
     appAuthVersion = '0.2.0'
     retrofitVersion = '2.1.0'
     okhttpVersion = '3.4.1'
     picassoVersion = '2.5.0'
-    archRoomVersion = '1.1.0-beta1'
+    archRoomVersion = '1.1.1-rc1'
     circleImageViewVersion = '2.2.0'
     markwonVersion = '1.0.4'
 }
 
 dependencies {
-    implementation 'com.android.support:support-v4:26.1.0'
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
         exclude group: 'com.android.support', module: 'support-annotations'

build.gradle

@@ -9,8 +9,8 @@ buildscript {
     }
     dependencies {
 
-        classpath 'com.android.tools.build:gradle:3.1.2'
-	    classpath 'com.google.gms:google-services:3.1.0'
+        classpath 'com.android.tools.build:gradle:3.1.3'
+	    classpath 'com.google.gms:google-services:3.2.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files