Add Fernflower fork

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "fernflower"]
+	path = fernflower
+	url = https://github.com/openrs2/fernflower.git

fernflower

@@ -0,0 +1 @@
+Subproject commit e4d2d24f9b4d074d3f8c43d3d659535c4f7b15eb

pom.xml

@@ -13,6 +13,7 @@
     <module>asm</module>
     <module>deob</module>
     <module>deob-annotations</module>
+    <module>fernflower</module>
     <module>game</module>
     <module>util</module>
   </modules>
@@ -68,12 +69,24 @@
         <artifactId>slf4j-api</artifactId>
         <version>1.7.26</version>
       </dependency>
+      <dependency>
+        <groupId>org.assertj</groupId>
+        <artifactId>assertj-core</artifactId>
+        <version>3.13.1</version>
+        <scope>test</scope>
+      </dependency>
       <dependency>
         <groupId>org.junit.jupiter</groupId>
         <artifactId>junit-jupiter</artifactId>
         <version>5.5.1</version>
         <scope>test</scope>
       </dependency>
+      <dependency>
+        <groupId>junit</groupId>
+        <artifactId>junit</artifactId>
+        <version>4.12</version>
+        <scope>test</scope>
+      </dependency>
     </dependencies>
   </dependencyManagement>