message: Add syntax highlighting for js & graphql snippets
diff: @@ -26,7 +26,7 @@ npm install --save @okgrow/graphql-scalars
  To use these scalars you'll need to add them in two places, your schema and your resolvers map.
  In your schema:
  -```
  +```graphql
  scalar DateTime
  scalar PositiveInt
  @@ -39,7 +39,7 @@ scalar URL
  ```
  In your resolver map, first import them:
  -```
  +```js
  import {
  DateTime,
  PositiveInt,
  @@ -52,7 +52,7 @@ import {
  Then make sure they're in the root resolver map like this:
  -```
  +```graphql
  const myResolverMap = {
  DateTime,
  @@ -75,13 +75,13 @@ const myResolverMap = {
  ```
  Alternatively, use the default import and ES6's (QUESTION: is this ES7?) object spread syntax:
  -```
  +```js
  import OKGGraphQLScalars from '@okgrow/graphql-scalars';
  ```
  Then make sure they're in the root resolver map like this:
  -```
  +```graphql
  const myResolverMap = {
  ...OKGGraphQLScalars,
  @@ -97,7 +97,7 @@ const myResolverMap = {
  That's it. Now you can use these scalar types in your schema definition like this:
  -```
  +```graphql
  type Person {
  birthDate: DateTime
  ageInYears: PositiveInt
  