Fix vulnerabilities (#7)

* update dependencies

* upgrade node version

* add relase instructions

* bump version

.nvmrc

@@ -1 +1 @@
-6.9.2
+9.11.1

RELEASE.md

@@ -0,0 +1,28 @@
+# Release instructions
+
+These are the minimum required steps to publish the statful AWS collector on npm.  
+Must be executed in the following order
+
+## Locally
+1. ```npm run test```
+2. ```npm run build```
+3. update version in package.json
+
+## GitHub
+
+### Pull Request
+1. create a new pull request
+2. merge pull request by selecting "squash and merge" from the dropdown selector
+
+### New Release
+1. click in the "draft new release" button on repo homepage
+2. insert the version as it is in package.json
+3. Add a necessary summary for the current release (optional)
+4. click the "Publish Release" button
+
+## NPM
+
+1. login into npm in a terminal window ```npm login```
+2. run ```npm publish```
+
+Check the [statful-collector-aws](https://www.npmjs.com/package/statful-collector-aws) on NPM to verify that the newly created version is available.