fix(deps): package.json to reduce vulnerabilities (#21)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/npm:cryptiles:20180710
- https://snyk.io/vuln/npm:deep-extend:20180409
- https://snyk.io/vuln/npm:extend:20180424
- https://snyk.io/vuln/npm:hoek:20180212
- https://snyk.io/vuln/npm:sshpk:20180409
- https://snyk.io/vuln/npm:stringstream:20180511

package.json

@@ -27,8 +27,8 @@
   "homepage": "https://github.com/lirantal/agilemanager-api#readme",
   "dependencies": {
     "lodash": "^4.6.1",
-    "request": "^2.69.0",
-    "semantic-release": "^15.0.0"
+    "request": "^2.84.0",
+    "semantic-release": "^15.9.15"
   },
   "devDependencies": {
     "coveralls": "^3.0.0",