Upgrade the lowest supported version to 6

Hyunje Jun · Hyunje Jun · commit f18aa824617c · 2018-09-21T14:32:50.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: node_js
 node_js:
-  - "4"
   - "6"
   - "8"
+  - "10"
diff --git a/README.md b/README.md
@@ -33,7 +33,7 @@ reading them beforehand.
 
 ## Requirements
 
-* **Node.js** 4 or higher
+* **Node.js** 6 or higher
 
 ## Contributing
 
diff --git a/package.json b/package.json
@@ -3,7 +3,7 @@
   "version": "6.2.1",
   "description": "Node.js SDK for LINE Messaging API",
   "engines": {
-    "node": ">=4"
+    "node": ">=6"
   },
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

-Original file line number
+Diff line change
@@ @@ -1,5 +1,5 @@ @@
 language: node_js
 node_js:
 -  - "4"
   - "6"
   - "8"
 +  - "10"