Upgrade to NAN 2 for Node 4+ support. Thanks for the code @Bigous

Author: cjbj

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## node-oracledb v1.4.0 (DD Mon YYYY)
 
+- Upgrade NAN dependency to version 2 allowing node-oracledb to build 
+  with Node 4.
+
 - Fixed cursor leak when statements execution fails.
 
 ## node-oracledb v1.3.0 (15 Oct 2015)

package.json

@@ -33,7 +33,7 @@
     "url": "git://github.com/oracle/node-oracledb.git"
   },
   "dependencies": {
-    "nan": "^1.8.4"
+    "nan": "^2.1.0"
   },
   "devDependencies": {
       "mocha": "~2.2.5",
@@ -44,9 +44,8 @@
       "test": "mocha -R spec --timeout 10000 test/*.js",
       "testWindows": "mocha -R spec --timeout 0 test\\*.js"
   },
-  "engineStrict": true,
   "engines": {
-    "node": ">=0.10.28 <3"
+    "node": ">=0.10.28 <6"
   },
   "maintainers": [
     {