added supporting of @var variables. The @var annotation has the same functionality as the @val except 'final' modifier.

test/transform/resource/before/VarComplex.java

@@ -0,0 +1,22 @@
+import lombok.var;
+
+public class VarComplex {
+	private String field = "";
+	private static final int CONSTANT = 20;
+
+	public void testComplex() {
+		var shouldBeCharArray = field.toCharArray();
+		var shouldBeInt = CONSTANT;
+		var lock = new Object();
+		synchronized (lock) {
+			var field = 20; //Shadowing
+			var inner = 10;
+			switch (field) {
+				case 5:
+					var shouldBeCharArray2 = shouldBeCharArray;
+					var innerInner = inner;
+			}
+		}
+		var shouldBeString = field; //Unshadowing
+	}
+}