Update API level to support canvas functions

Author: emersoncloud

blurkit/build.gradle

@@ -12,12 +12,16 @@ android {
     buildToolsVersion '28.0.2'
 
     defaultConfig {
-        minSdkVersion 16
+        minSdkVersion 21
         targetSdkVersion 28
         versionCode 1
         versionName "1.0.0"
         renderscriptTargetApi 28
         renderscriptSupportModeEnabled true
+        testInstrumentationRunner 'android.support.test.runner.AndroidJUnitRunner'
+    }
+    testOptions {
+        unitTests.returnDefaultValues = true
     }
     buildTypes {
         release {
@@ -29,6 +33,13 @@ android {
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    testImplementation 'junit:junit:4.12'
+    testImplementation 'org.mockito:mockito-core:1.10.19'
+    androidTestImplementation 'com.android.support:support-annotations:28.0.0'
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
+    androidTestImplementation 'com.android.support.test:rules:1.0.2'
+    androidTestImplementation 'org.hamcrest:hamcrest-library:1.3'
+
 }
 
 apply from: 'https://raw.githubusercontent.com/blundell/release-android-library/master/android-release-aar.gradle'

demo/build.gradle

@@ -5,7 +5,7 @@ android {
     buildToolsVersion '28.0.2'
     defaultConfig {
         applicationId "com.alterac.blurkit.demo"
-        minSdkVersion 16
+        minSdkVersion 21
         targetSdkVersion 28
         versionCode 1
         versionName "1.0"