build.gradle: update version name to 1.1.2

Author: sds100

app/build.gradle

@@ -17,8 +17,8 @@ android {
         applicationId "io.github.sds100.keymapper"
         minSdkVersion 19
         targetSdkVersion 29
-        versionCode 19
-        versionName "1.1.1"
+        versionCode 20
+        versionName "1.1.2"
         vectorDrawables.useSupportLibrary = true
     }