Replace newInstance() with getDeclaredConstructor().newInstance()

Again, if these are removed from a future JDK we'll need to move this
transform to the bytecode deobfuscator.

deob-ast/src/main/java/dev/openrs2/deob/ast/AstDeobfuscator.java

@@ -19,6 +19,7 @@ import dev.openrs2.deob.ast.transform.ComplementTransformer;
 import dev.openrs2.deob.ast.transform.EncloseTransformer;
 import dev.openrs2.deob.ast.transform.IfElseTransformer;
 import dev.openrs2.deob.ast.transform.NegativeLiteralTransformer;
+import dev.openrs2.deob.ast.transform.NewInstanceTransformer;
 import dev.openrs2.deob.ast.transform.TernaryTransformer;
 import dev.openrs2.deob.ast.transform.Transformer;
 import dev.openrs2.deob.ast.transform.UnencloseTransformer;
@@ -35,6 +36,7 @@ public final class AstDeobfuscator {
 		new AddSubTransformer(),
 		new BitMaskTransformer(),
 		new ValueOfTransformer(),
+		new NewInstanceTransformer(),
 		new EncloseTransformer()
 	);
 

deob-ast/src/main/java/dev/openrs2/deob/ast/transform/NewInstanceTransformer.java

@@ -0,0 +1,25 @@
+package dev.openrs2.deob.ast.transform;
+
+import com.github.javaparser.ast.CompilationUnit;
+import com.github.javaparser.ast.Node;
+import com.github.javaparser.ast.expr.MethodCallExpr;
+import dev.openrs2.deob.ast.util.NodeUtils;
+
+public final class NewInstanceTransformer extends Transformer {
+	@Override
+	public void transform(CompilationUnit unit) {
+		NodeUtils.walk(unit, Node.TreeTraversal.POSTORDER, MethodCallExpr.class, expr -> {
+			if (!expr.getNameAsString().equals("newInstance")) {
+				return;
+			}
+
+			expr.getScope().ifPresent(scope -> {
+				if (scope.isMethodCallExpr() && scope.asMethodCallExpr().getNameAsString().equals("getConstructor")) {
+					return;
+				}
+
+				expr.setScope(new MethodCallExpr(scope.clone(), "getDeclaredConstructor"));
+			});
+		});
+	}
+}