Fix dev environment (#505)

.vscode/settings.json

@@ -11,5 +11,6 @@
         "node_modules": true,
         "bin": true,
         "out": true
-    }
+    },
+    "typescript.tsdk": "node_modules/typescript/lib"
 }

package-lock.json

@@ -43,6 +43,12 @@
       "integrity": "sha512-tHq6qdbT9U1IRSGf14CL0pUlULksvY9OZ+5eEgl1N7t+OA3tGvNpxJCzuKQlsNgCVwbAs670L1vcVQi8j9HjnA==",
       "dev": true
     },
+    "@types/mocha": {
+      "version": "5.2.5",
+      "resolved": "https://registry.npmjs.org/@types/mocha/-/mocha-5.2.5.tgz",
+      "integrity": "sha512-lAVp+Kj54ui/vLUFxsJTMtWvZraZxum3w3Nwkble2dNuV5VnPA+Mi2oGX9XYJAaIvZi3tn3cbjS/qcJXRb6Bww==",
+      "dev": true
+    },
     "@types/node": {
       "version": "6.14.2",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-6.14.2.tgz",

package.json

@@ -564,6 +564,7 @@
     "winreg": "0.0.13"
   },
   "devDependencies": {
+    "@types/mocha": "^5.2.5",
     "@types/q": "^1.0.3",
     "@types/rimraf": "^2.0.2",
     "@types/semver": "^5.5.0",