Additional unit tests for the patcher + many bugfixes

build.gradle

@@ -223,7 +223,7 @@ configure(project(":annotations")){
 }
 
 //compile with java 8 compatibility for everything except the annotation project
-configure(subprojects - project(":annotations")){
+configure(subprojects - project(":annotations") - project(":tests")){
     tasks.withType(JavaCompile){
         options.compilerArgs.addAll(['--release', '8'])
     }
@@ -400,6 +400,12 @@ project(":tests"){
         testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:5.7.1"
     }
 
+    tasks.withType(JavaCompile){
+        targetCompatibility = JavaVersion.VERSION_17
+        sourceCompatibility = JavaVersion.VERSION_17
+        options.compilerArgs.addAll(['--release', '17'])
+    }
+
     test{
         //fork every test so mods don't interact with each other
         forkEvery = 1