Updated v7 GridLayout to version 22

sample/build.gradle

@@ -19,5 +19,5 @@ android {
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     compile project(':library')
-    compile 'com.android.support:gridlayout-v7:21.0.0'
+    compile 'com.android.support:gridlayout-v7:22.0.0'
 }