do not trigger no-incorrect-deep-equal for regular expression

fixes avajs#270

Author: Mika Andrianarijaona

.gitignore

@@ -2,3 +2,4 @@ node_modules
 yarn.lock
 .nyc_output
 coverage
+.vscode

rules/no-incorrect-deep-equal.js

@@ -34,7 +34,7 @@ const create = context => {
 	const deepEqual = '[callee.property.name="deepEqual"]';
 	const notDeepEqual = '[callee.property.name="notDeepEqual"]';
 
-	const argumentsLiteral = ':matches([arguments.0.type="Literal"],[arguments.1.type="Literal"])';
+	const argumentsLiteral = ':matches([arguments.0.type="Literal"][arguments.0.regex="undefined"],[arguments.1.type="Literal"][arguments.1.regex="undefined"])';
 	const argumentsUndefined = ':matches([arguments.0.type="Identifier"][arguments.0.name="undefined"],[arguments.1.type="Identifier"][arguments.1.name="undefined"])';
 	const argumentsTemplate = ':matches([arguments.0.type="TemplateLiteral"],[arguments.1.type="TemplateLiteral"])';
 

test/no-incorrect-deep-equal.js

@@ -40,6 +40,12 @@ ruleTester.run('no-incorrect-deep-equal', rule, {
 			test('x', t => {
 				t.notDeepEqual(expression, []);
 			});
+		`,
+		`
+			${header}
+			test('x', t => {
+				t.deepEqual(expression, /regex/);
+			});
 		`
 	],
 	invalid: [