test: fix babel-preset-gatsby error in travisci

.travis.yml

@@ -1,15 +1,14 @@
-sudo: false
 language: node_js
+
 node_js:
-- '12'
+  - '12'
+
 env:
-  matrix:
-    - TEST_TYPE=ci
-    - NODE_ENV=test
-branches:
-  only:
-  - master
+  - NODE_ENV=test
+
 install:
-- yarn install
+  - yarn install
+
 script:
-- yarn run lint
+  - yarn lint
+  - yarn test

babel.config.js

@@ -5,6 +5,7 @@ module.exports = api => {
   const isCommonJS = api.env('cjs');
   const isESModule = api.env('esm');
   const isTest = api.env('test');
+
   if (process.env.GATSBY === 'true') { //
     return {
       presets: [
@@ -33,6 +34,7 @@ module.exports = api => {
       ]
     };
   }
+
   return {
     presets: [
       [