Stop reading .babelrc files.

If a `.babelrc` file is present, it is being read, and the settings merged with the ones we specify for tests. We don't want that.

Reference:
 http://babeljs.io/docs/usage/options/

Author: jamestalmage

lib/test-worker.js

@@ -51,7 +51,8 @@ var send = require('./send');
 
 // if generators are not supported, use regenerator
 var options = {
-	sourceMaps: true
+	sourceMaps: true,
+	babelrc: false
 };
 
 // check if test files required ava and show error, when they didn't

test/fixture/babelrc/.babelrc

@@ -0,0 +1,3 @@
+{
+  "plugins": ["this-plugin-does-not-exist"]
+}

test/fixture/babelrc/package.json

@@ -0,0 +1,4 @@
+{
+  "name": "application-name",
+  "version": "0.0.1"
+}

test/fixture/babelrc/test.js

@@ -0,0 +1,3 @@
+import test from '../../../'
+
+test(t => t.pass());

test/fork.js

@@ -83,3 +83,12 @@ test('destructuring of `t` is allowed', function (t) {
 			t.end();
 		});
 });
+
+test('babelrc is ignored', function (t) {
+	fork(fixture('babelrc/test.js'))
+	.run()
+	.then(function (info) {
+		t.is(info.stats.passCount, 1);
+		t.end();
+	});
+});