docs: update external links (#1969)

danhogan · meteorlxy · commit 5bb6bbd36495 · 2019-12-03T19:33:59.000+08:00
diff --git a/packages/docs/docs/.vuepress/components/Bit.vue b/packages/docs/docs/.vuepress/components/Bit.vue
@@ -3,6 +3,7 @@
     <a
       href="https://www.bitsrc.io/?utm_source=vue&utm_medium=vue&utm_campaign=vue&utm_term=vue&utm_content=vue"
       target="_blank"
+      rel="noopener noreferrer"
     >
       <span>This project is sponsored by</span>
       <img
diff --git a/packages/vuepress/README.md b/packages/vuepress/README.md
@@ -1,5 +1,5 @@
 <p align="center">
-  <a href="https://vuepress.vuejs.org/" target="_blank">
+  <a href="https://vuepress.vuejs.org/" target="_blank" rel="noopener noreferrer">
     <img width="180" src="https://raw.githubusercontent.com/vuejs/vuepress/master/packages/docs/docs/.vuepress/public/hero.png" alt="logo">
   </a>
 </p>

Original file line number	Diff line number	Diff line change
`@@ -3,6 +3,7 @@`
`3`	`3`	`<a`
`4`	`4`	`href="https://www.bitsrc.io/?utm_source=vue&utm_medium=vue&utm_campaign=vue&utm_term=vue&utm_content=vue"`
`5`	`5`	`target="_blank"`
	`6`	`+ rel="noopener noreferrer"`
`6`	`7`	`>`
`7`	`8`	`<span>This project is sponsored by</span>`
`8`	`9`	`<img`