[chore] Drop support for old nodejs versions (0.10 & 0.12) (#493)

.travis.yml

@@ -1,21 +1,10 @@
 sudo: false
 language: node_js
 node_js:
-  - "0.10"
-  - "0.12"
   - "4"
   - "6"
   - "7"
 git:
   depth: 1
-env:
-  - CXX=g++-4.8
-addons:
-  apt:
-    sources:
-      - ubuntu-toolchain-r-test
-    packages:
-      - g++-4.8
-
 notifications:
   irc: "irc.freenode.org#socket.io"

test/server.js

@@ -2603,23 +2603,21 @@ describe('server', function () {
     });
   });
 
-  if (!UWS_ENGINE && parseInt(process.versions.node, 10) >= 4) {
-    describe('wsEngine option', function () {
-      it('should allow loading of other websocket server implementation like uws', function (done) {
-        var engine = listen({ allowUpgrades: false, wsEngine: 'uws' }, function (port) {
-          expect(engine.ws instanceof require('uws').Server).to.be.ok();
-          var socket = new eioc.Socket('ws://localhost:%d'.s(port));
-          engine.on('connection', function (conn) {
-            conn.send('a');
-          });
-          socket.on('open', function () {
-            socket.on('message', function (msg) {
-              expect(msg).to.be('a');
-              done();
-            });
+  describe('wsEngine option', function () {
+    it('should allow loading of other websocket server implementation like uws', function (done) {
+      var engine = listen({ allowUpgrades: false, wsEngine: 'uws' }, function (port) {
+        expect(engine.ws instanceof require('uws').Server).to.be.ok();
+        var socket = new eioc.Socket('ws://localhost:%d'.s(port));
+        engine.on('connection', function (conn) {
+          conn.send('a');
+        });
+        socket.on('open', function () {
+          socket.on('message', function (msg) {
+            expect(msg).to.be('a');
+            done();
           });
         });
       });
     });
-  }
+  });
 });