fix chokidar update by removing support for nodejs 6 (#34)

and update build scripts

Author: tomap

.travis.yml

@@ -8,7 +8,8 @@ cache:
     - node_modules
 
 node_js:
-  - "6"
+  - "8"
+  - "10"
   - "node"
 
 script:

appveyor.yml

@@ -5,6 +5,7 @@ init:
 # Test against these versions of Node.js.
 environment:
   matrix:
+    - nodejs_version: "8"
     - nodejs_version: "LTS"
     - nodejs_version: "Stable"
 

package.json

@@ -29,19 +29,19 @@
   "license": "MIT",
   "dependencies": {
     "bluebird": "^3.5.1",
-    "chokidar": "^2.0.4",
+    "chokidar": "^3.0.0",
     "escape-string-regexp": "^1.0.5",
     "graceful-fs": "^4.1.11"
   },
   "devDependencies": {
     "chai": "^4.1.2",
-    "eslint": "^5.9.0",
+    "eslint": "^5.16.0",
     "eslint-config-hexo": "^3.0.0",
     "iferr": "^1.0.2",
     "istanbul": "^0.4.5",
     "mocha": "^6.0.2"
   },
   "engines": {
-    "node": ">=6.9.0"
+    "node": ">=8"
   }
 }