Bump sdk version

Author: fornwall

app/build.gradle

@@ -1,7 +1,7 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 27
     buildToolsVersion "27.0.0"
 
     dependencies {
@@ -12,7 +12,7 @@ android {
     defaultConfig {
         applicationId "com.termux.boot"
         minSdkVersion 21
-        targetSdkVersion 26
+        targetSdkVersion 27
         versionCode 3
         versionName "0.3"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"