Update to injector 1.0

- Includes Factory and SingletonStore so our custom implementation is removed

src/test/java/fr/xephi/authme/task/CleanupTaskTest.java

@@ -1,7 +1,7 @@
 package fr.xephi.authme.task;
 
+import ch.jalu.injector.factory.SingletonStore;
 import fr.xephi.authme.initialization.HasCleanup;
-import fr.xephi.authme.initialization.factory.SingletonStore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.InjectMocks;