Implements break statement

UpsilonTests/GeneralTests/ForLoopTests.cs

@@ -59,5 +59,25 @@ return a";
             Assert.Equal(15, result);
         }
 
+        [Fact]
+        public void NumericForLoopBreakTest()
+        {
+            const string input = @"
+a = 0
+for i=0,10 do
+    a = a + i
+    if i == 5 then
+        break
+    end
+end
+return a
+";
+            var script = new Script(input, BoundScope, StaticScope);
+            Assert.Empty(script.Diagnostics.Messages);
+            var result = script.Evaluate<long>();
+            Assert.Empty(script.Diagnostics.Messages);
+            Assert.Equal(15, result);
+        }
+
     }
 }

UpsilonTests/GeneralTests/ScopeTests.cs

@@ -14,9 +14,10 @@ namespace UpsilonTests.GeneralTests
         {
             const string input = @"
 a = 10
-if true then
+function testFunc()
     local a = 100
 end
+testFunc()
 ";
             var script = new Script(input, BoundScope, StaticScope);
             Assert.Empty(script.Diagnostics.Messages);