Infrastructure: Fix problem running regression from Windows command line

Changes command aliases in package.json to move test globbing to the Ava configuration to solve issues where Windows wasn't able to find files when using wildcards to specify which tests to run via the command line.
npm scripts run command line operations using syntax features of the operating system. 
With this change, when running regression tests from the command line,  Ava will use its own internal globbing algorithm (globby), which has cross-platform support.

* fix: don't glob in scripts
* fix: use ava config to glob tests

Signed-off-by: Evan Yamanishi <yamanishi1@gmail.com>

package.json

@@ -13,7 +13,7 @@
     "lint:es": "eslint .",
     "lint:js": "npm run lint:es",
     "lint:html": "npm run vnu-jar",
-    "regression": "ava test/tests/*.js",
+    "regression": "ava",
     "regression-report": "node test/util/report",
     "test": "npm run lint && npm run regression",
     "vnu-jar": "java -jar node_modules/vnu-jar/build/dist/vnu.jar --errors-only --filterfile .vnurc --no-langdetect --skip-non-html *.html examples/"
@@ -55,5 +55,10 @@
       "eslint --fix",
       "git add"
     ]
+  },
+  "ava": {
+    "files": [
+      "test/tests/*"
+    ]
   }
 }