Simplify babel integration further

The "react" preset is composed of a bunch of plugins.
https://babeljs.io/docs/plugins/preset-react/

Turns out, we only need 2 of them, not all 5.

.babelrc

@@ -1,5 +1,6 @@
 {
-  "presets": [
-    "react"
+  "plugins": [
+    "syntax-jsx",
+    "transform-react-jsx"
   ]
 }

bin/check-deps.js

@@ -45,7 +45,13 @@ var BUILT_IN_ELECTRON_MODULES = [ 'electron' ]
 
 var BUILT_IN_DEPS = [].concat(BUILT_IN_NODE_MODULES, BUILT_IN_ELECTRON_MODULES)
 
-var EXECUTABLE_DEPS = ['gh-release', 'standard', 'babel-cli', 'babel-preset-react']
+var EXECUTABLE_DEPS = [
+  'gh-release',
+  'standard',
+  'babel-cli',
+  'babel-plugin-syntax-jsx',
+  'babel-plugin-transform-react-jsx'
+]
 
 main()
 

package.json

@@ -46,7 +46,8 @@
   },
   "devDependencies": {
     "babel-cli": "^6.11.4",
-    "babel-preset-react": "^6.11.1",
+    "babel-plugin-syntax-jsx": "^6.13.0",
+    "babel-plugin-transform-react-jsx": "^6.8.0",
     "cross-zip": "^2.0.1",
     "electron-osx-sign": "^0.3.0",
     "electron-packager": "^7.0.0",