Update test.

Author: h3nrique

src/test/java/io/eigr/spawn/test/extensions/SimpleDependencyInjectorTest.java

@@ -2,16 +2,16 @@
 
 import io.eigr.spawn.api.extensions.DependencyInjector;
 import io.eigr.spawn.api.extensions.SimpleDependencyInjector;
-import org.junit.Before;
-import org.junit.Test;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
 
-import static org.junit.Assert.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
-public class SimpleDependencyInjectorTest {
+class SimpleDependencyInjectorTest {
 
     private DependencyInjector injector;
 
-    @Before
+    @BeforeEach
     public void before() {
         injector = SimpleDependencyInjector.createInjector();
     }