Add 2% tolerance to vector rendering tests

rendering/cases/layer-vectortile-simple/main.js

@@ -23,4 +23,7 @@ new Map({
   })
 });
 
-render({message: 'Vector tile layer renders'});
+render({
+  message: 'Vector tile layer renders',
+  tolerance: 0.02
+});

rendering/cases/linestring-style-rotation/main.js

@@ -67,4 +67,4 @@ new Map({
   })
 });
 
-render();
+render({tolerance: 0.02});