README: Use JS syntax highlighting for config snippet

Turbo87 · web-flow · commit 5ec0c1f21988 · 2017-12-24T12:07:03.000+01:00
diff --git a/README.md b/README.md
@@ -6,7 +6,7 @@ This provides debug macros and feature flagging.
 
 The plugin takes 5 types options: `envFlags`, `features`, `debugTools`, `externalizeHelpers` and `svelte`. The `importSpecifier` is used as a hint to this plugin as to where macros are being imported and completely configurable by the host. Like Babel you can supply your own helpers using the `externalizeHelpers` options.
 
-```
+```js
 {
   plugins: [
     ['babel-debug-macros', {

Original file line number	Diff line number	Diff line change
`@@ -6,7 +6,7 @@ This provides debug macros and feature flagging.`
`6`	`6`
`7`	`7`	The plugin takes 5 types options: `envFlags`, `features`, `debugTools`, `externalizeHelpers` and `svelte`. The `importSpecifier` is used as a hint to this plugin as to where macros are being imported and completely configurable by the host. Like Babel you can supply your own helpers using the `externalizeHelpers` options.
`8`	`8`
`9`		-```
	`9`	+```js
`10`	`10`	`{`
`11`	`11`	`plugins: [`
`12`	`12`	`['babel-debug-macros', {`