Make test less strict on anti aliasing, disable cache. (fabricjs#5077)

* ok

* remove canfail

.travis.yml

@@ -74,11 +74,11 @@ jobs:
       node_js: "8"
       script: npm run test:visual
     - stage: Visual Tests
-      env: LAUNCHER=Chrome CANFAIL=TRUE
+      env: LAUNCHER=Chrome
       install: npm install [email protected] [email protected]
       script: npm run build:fast && testem ci --port 8080 -f testem-visual.json -l $LAUNCHER
     - stage: Visual Tests
-      env: LAUNCHER=Firefox CANFAIL=TRUE
+      env: LAUNCHER=Firefox
       install: npm install [email protected] [email protected]
       script: npm run build:fast && testem ci --port 8080 -f testem-visual.json -l $LAUNCHER
 

test/visual/svg_import.js

@@ -6,10 +6,10 @@
   }
   var fabricCanvas = this.canvas = new fabric.Canvas(null, {enableRetinaScaling: false, renderOnAddRemove: false});
   var pixelmatchOptions = {
-    includeAA: true,
-    threshold: 0.1
+    includeAA: false,
+    threshold: 0.095
   };
-
+  fabric.Object.prototype.objectCaching = false;
   function getAbsolutePath(path) {
     var isAbsolute = /^https?:/.test(path);
     if (isAbsolute) { return path; };