Fix new Set() and new Interval()

src/main/java/leekscript/runner/AI.java

@@ -3123,6 +3123,14 @@ public MapLeekValue new_mapClass() {
 		return new MapLeekValue(this);
 	}
 
+	public SetLeekValue new_setClass() throws LeekRunException {
+		return new SetLeekValue(this);
+	}
+
+	public IntervalLeekValue new_intervalClass() throws LeekRunException {
+		return new RealIntervalLeekValue(this);
+	}
+
 	public ObjectLeekValue new_objectClass() {
 		return new ObjectLeekValue(this, this.objectClass);
 	}

src/test/java/test/TestInterval.java

@@ -29,6 +29,7 @@ public void run() throws Exception {
 		code_v1("return [1.0 ..[").equals("[1..∞[");
 		code_v2_("return [1.0 ..[").equals("[1.0..∞[");
 		code("[1..2]").ops(2);
+		code_v3_("Interval a = new Interval() return a").equals("[..]");
 
 		section("Interval.intervalMin");
 		code("return intervalMin([1..2])").equals("1");

src/test/java/test/TestSet.java

@@ -11,6 +11,7 @@ public void run() throws Exception {
 		code("return <>").equals("<>");
 		DISABLED_code("return <<>>").equals("<<>>");
 		code("<1, 2, 3, 4>").ops(8);
+		code_v3_("Set<integer> a = new Set() return a").equals("<>");
 
 		section("Set typing");
 		code_strict_v4_("Set i = <1, 2>; return i instanceof Set").equals("true");