Add support for node 10

Author: glibas

.travis.yml

@@ -6,6 +6,7 @@ os:
 
 env:
   matrix:
+    - NODE_VERSION="10.15"
     - NODE_VERSION="8.6"
     - NODE_VERSION="6.11"
     - NODE_VERSION="4.4"

appveyor.yml

@@ -2,23 +2,37 @@ version: 1.0-{build}
 os: Visual Studio 2015
 environment:
   matrix:
+    - nodejs_version: 10.15
+      platform: x64
+      npm_version: 6.4.1
+      nan_version: 2.13.2
+      pre_gyp_version: 0.12.0
     - nodejs_version: 8.6
       platform: x64
+      npm_version: 6.4.1
+      nan_version: 2.13.2	
+      pre_gyp_version: 0.12.0	  
     - nodejs_version: 6.11
       platform: x64
+      npm_version: 6.4.1
+      nan_version: 2.13.2
+      pre_gyp_version: 0.12.0	  
     - nodejs_version: 4.8
       platform: x64
+      npm_version: 5.5.1
+      nan_version: 2.7.0
+      pre_gyp_version: 0.6.39	  
 
 cache:
   - '%APPDATA%\npm-cache'
 install:
   - ps: Install-Product node $env:nodejs_version $env:platform
   # Upgrade npm
   # - npm install -g npm
-  - npm install -g npm@5.5.1
+  - npm install -g npm@%npm_version%
   - set PATH=%APPDATA%\npm;%PATH%
-  - npm i nan@2.7.0
-  - npm install -g node-pre-gyp@0.6.39
+  - npm i nan@%nan_version%
+  - npm install -g node-pre-gyp@%pre_gyp_version%
   - npm install -g node-pre-gyp-github
 
 build_script:

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "node-libxml",
-  "version": "3.2.3",
+  "version": "3.2.4",
   "description": "Check Wellformed, DTD validity & get Xpath from pure node addons",
   "main": "index.js",
   "repository": {