ignoring composer.lock

Author: Dennis Stücken

.gitignore

@@ -48,4 +48,5 @@ atlassian-ide-plugin.xml
 # Crashlytics plugin (for Android Studio and IntelliJ)
 com_crashlytics_export_strings.xml
 crashlytics.properties
-crashlytics-build.properties
+crashlytics-build.properties
+composer.lock