Bump vscode version to 1.18

Author: Piotr Puszkiewicz

.travis.yml

@@ -4,7 +4,7 @@ node_js:
 - "6"
 
 env:
-- CODE_VERSION=1.17.2
+- CODE_VERSION=1.18.0
 
 before_install:
   - if [ $TRAVIS_OS_NAME == "linux" ]; then

package.json

@@ -205,7 +205,7 @@
     }
   ],
   "engines": {
-    "vscode": "^1.17.0"
+    "vscode": "^1.18.0"
   },
   "activationEvents": [
     "onDebug",