add template literal test and fix syntax error

Author: Tim Chon

src/__tests__/fixtures/component_2.js

@@ -29,3 +29,7 @@ export function foo() {
 export function chained() {
   return foo.bar().join();
 }
+
+export function templateLiteral() {
+  return `foo bar`.split(' ');
+}

src/utils/isStatelessComponent.js

@@ -32,7 +32,7 @@ function isValidCalleeType(type) {
     'Identifier',
     'CallExpression',
     'ArrayExpression',
-    'TemplateLiteral'
+    'TemplateLiteral',
     'Literal'
   ].indexOf(type) < 0;
 }