Fix tests (#96)

Closes #63

- Switch from testling to jsdom for browser APIs
- Switch from coverify to nyc for coverage reports
- Clean up related dead code and tooling
- Update Travis to use Node v6 and v8, since we need ES6 features for jsdom.

package.json

@@ -22,44 +22,29 @@
   ],
   "devDependencies": {
     "browserify": "^3.46.0",
-    "coverify": "^1.0.6",
     "jscs": "^1.6.2",
+    "jsdom": "^11.5.1",
+    "jsdom-global": "^3.0.2",
     "jshint": "^2.5.6",
     "npmpub": "^3.1.0",
+    "nyc": "^11.4.1",
     "opn-cli": "^3.1.0",
     "serve": "1.4.0",
-    "tape": "^3.0.0",
-    "testling": "^1.6.1"
+    "tap-nyc": "^1.0.3",
+    "tap-spec": "^4.1.1",
+    "tape": "^3.0.0"
   },
   "scripts": {
     "lint": "jscs **/*.js && jshint . --exclude-path .gitignore",
     "standalone": "browserify index.js --standalone Pjax > pjax.js",
     "build-debug": "browserify index.js --debug --standalone Pjax > pjax.js",
-    "tests": "testling",
-    "test": "npm run lint && npm run standalone && npm run tests",
-    "test--html": "testling --html > tests/scripts/index.html",
-    "coverage": "browserify -t coverify tests/**/*.js | testling | coverify",
+    "tests": "tape -r ./tests/index.js ./tests/**/*.js",
+    "test": "npm run lint && npm run tests | tap-spec",
+    "coverage-tests": "npm run tests | tap-nyc",
+    "coverage": "nyc -x \"tests/**\" npm run coverage-tests",
     "example": "opn http://localhost:3000/example/; serve .",
     "prepublish": "npm run standalone",
     "#release": "testling does not work in a process launch by npm... :facepalm:",
     "release": "echo \"npmpub --skip-test --dry && npm test && npmpub --skip-test --skip-cleanup\""
-  },
-  "testling": {
-    "files": "tests/**/*.js",
-    "browsers": [
-      "ie/10..latest",
-      "firefox/4.0",
-      "firefox/latest",
-      "firefox/nightly",
-      "chrome/10",
-      "chrome/latest",
-      "chrome/canary",
-      "opera/12..latest",
-      "opera/next",
-      "safari/5.1..latest",
-      "ipad/6.0..latest",
-      "iphone/6.0..latest",
-      "android-browser/4.2..latest"
-    ]
   }
 }