drop 8 & adopt 14 (#222)

xingoxu · web-flow · commit b407e0d0a29e · 2020-05-29T18:19:53.000+09:00
* drop 8 &amp; adopt 14

* fix readme
diff --git a/.travis.yml b/.travis.yml
@@ -1,9 +1,9 @@
 language: node_js
 node_js:
-  - 8
   - 10
   - 12
+  - 14
 before_install:
-  - npm i -g npm@6
+  - npm i -g npm@latest
 install:
   - npm ci
diff --git a/README.md b/README.md
@@ -18,7 +18,7 @@ line-bot-sdk-nodejs documentation: https://line.github.io/line-bot-sdk-nodejs/#g
 
 ## Requirements
 
-* **Node.js** 8 or higher
+* **Node.js** 10 or higher
 
 ## Installation
 
