fix: Remove support for node 6 and 7

Author: rtfpessoa

.circleci/config.yml

@@ -35,16 +35,6 @@ jobs:
       - run: yarn run coverage-lcov
       - run: yarn run codacy
 
-  build-node_6:
-    <<: *common-build
-    docker:
-      - image: node:6
-
-  build-node_7:
-    <<: *common-build
-    docker:
-      - image: node:7
-
   build-node_8:
     <<: *common-build
     docker:
@@ -69,8 +59,6 @@ workflows:
   version: 2
   build:
     jobs:
-      - build-node_6
-      - build-node_7
       - build-node_8
       - build-node_9
       - build-node_10

package.json

@@ -32,7 +32,7 @@
     "url": "https://www.github.com/rtfpessoa/diff2html-cli/issues"
   },
   "engines": {
-    "node": ">=6"
+    "node": ">=8"
   },
   "preferGlobal": true,
   "scripts": {