Update plugin versions.

app/build.gradle

@@ -2,11 +2,11 @@ apply plugin: 'com.android.application'
 
 android {
     namespace "com.hyperling.apps.infinitetimer"
-    compileSdkVersion 36
+    compileSdkVersion 37
     defaultConfig {
         applicationId "com.hyperling.apps.infinitetimer"
         minSdkVersion 14
-        targetSdkVersion 36
+        targetSdkVersion 37
         versionCode 9
         versionName "1.1.2"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"