Update ava config and fix line endings

ava.config.js

@@ -1,7 +1,9 @@
 export default {
   files: ['test/unit/*'],
-  helpers: ['**/testUtils/**/*'],
-  compileEnhancements: false,
+  babel: {
+    compileEnhancements: false,
+    compileAsTests: ['**/testUtils/**/*']
+  },
   extensions: ['ts'],
   require: ['ts-node/register/transpile-only']
 };

package.json

@@ -58,6 +58,7 @@
     "xterm-addon-webgl": "^0.4.1"
   },
   "devDependencies": {
+    "@ava/babel": "1.0.0",
     "@babel/cli": "7.8.3",
     "@babel/core": "7.7.7",
     "@babel/plugin-proposal-class-properties": "^7.8.0",
@@ -88,7 +89,7 @@
     "@types/winreg": "1.2.30",
     "@typescript-eslint/eslint-plugin": "2.15.0",
     "@typescript-eslint/parser": "2.15.0",
-    "ava": "2.4.0",
+    "ava": "3.0.0",
     "babel-loader": "8.0.6",
     "babel-preset-minify": "0.5.1",
     "concurrently": "5.0.2",