feat: render markdown content urls as links (#1885)

Author: byteme980

packages/graphiql/src/components/DocExplorer/MarkdownContent.tsx

@@ -9,7 +9,10 @@ import React from 'react';
 import MD from 'markdown-it';
 import { Maybe } from '../../types';
 
-const md = new MD();
+const md = new MD({
+  // render urls as links, à la github-flavored markdown
+  linkify: true,
+});
 
 type MarkdownContentProps = {
   markdown?: Maybe<string>;

packages/graphiql/test/schema.js

@@ -321,7 +321,8 @@ const TestMutationType = new GraphQLObjectType({
 
 const TestSubscriptionType = new GraphQLObjectType({
   name: 'SubscriptionType',
-  description: 'This is a simple subscription type',
+  description:
+    'This is a simple subscription type. Learn more at https://graphql.org/blog/subscriptions-in-graphql-and-relay/',
   fields: {
     subscribeToTest: {
       type: TestType,