Fix linting for test directory.

Author: beefancohen

__tests__/index-test.js

@@ -1,4 +1,4 @@
-/* eslint-env mocha */
+/* eslint-env jest */
 /* eslint global-require: 0 */
 
 import assert from 'assert';

__tests__/src/rules/accessible-emoji-test.js

@@ -1,3 +1,4 @@
+/* eslint-env jest */
 /**
  * @fileoverview Enforce <marquee> elements are not used.
  * @author Ethan Cohen

__tests__/src/rules/anchor-has-content-test.js

@@ -1,3 +1,4 @@
+/* eslint-env jest */
 /**
  * @fileoverview Enforce anchor elements to contain accessible content.
  * @author Lisa Ring & Niklas Holmberg
@@ -33,7 +34,7 @@ describe('determineChildType', () => {
   describe('default case', () => {
     it('should return false', () => {
       expect(
-        determineChildType({})
+        determineChildType({}),
       ).toBe(false);
     });
   });

__tests__/src/rules/aria-props-test.js

@@ -1,3 +1,4 @@
+/* eslint-env jest */
 /**
  * @fileoverview Enforce all aria-* properties are valid.
  * @author Ethan Cohen

__tests__/src/rules/aria-proptypes-test.js

@@ -1,3 +1,4 @@
+/* eslint-env jest */
 /**
  * @fileoverview Enforce ARIA state and property values are valid.
  * @author Ethan Cohen

__tests__/src/rules/aria-role-test.js

@@ -1,3 +1,4 @@
+/* eslint-env jest */
 /**
  * @fileoverview Enforce aria role attribute is valid.
  * @author Ethan Cohen

__tests__/src/rules/aria-unsupported-elements-test.js

@@ -1,3 +1,4 @@
+/* eslint-env jest */
 /**
  * @fileoverview Enforce that elements that do not support ARIA roles,
  *  states and properties do not have those attributes.

__tests__/src/rules/click-events-have-key-events-test.js

@@ -1,3 +1,4 @@
+/* eslint-env jest */
 /**
  * @fileoverview Enforce a clickable non-interactive element has at least 1 keyboard event listener.
  * @author Ethan Cohen

__tests__/src/rules/heading-has-content-test.js

@@ -1,3 +1,4 @@
+/* eslint-env jest */
 /**
  * @fileoverview Enforce heading (h1, h2, etc) elements contain accessible content.
  * @author Ethan Cohen
@@ -33,7 +34,7 @@ describe('determineChildType', () => {
   describe('default case', () => {
     it('should return false', () => {
       expect(
-        determineChildType({})
+        determineChildType({}),
       ).toBe(false);
     });
   });

__tests__/src/rules/href-no-hash-test.js

@@ -1,3 +1,4 @@
+/* eslint-env jest */
 /**
  * @fileoverview Enforce links may not point to just #.
  * @author Ethan Cohen