Add Skyk to this repo

[charlesroper]

See: https://snyk.io/

[charlesroper]

Add Skyk to tombiovis and QGIS open source projects

[burkmarr]

@charlesroper - is that a private Trello Board? I can't access it.

[charlesroper]

Hi Rich, don't worry about the Trello link - it's just there to log the task internally. We're adding Snyk to monitor this repo for vulnerabilities. I've already added it now, so would you like me to add you onto the account too? It's already found a vulnerability.

Additionally, GitHub's own vulnerability scanner found something which Andy fixed (see the last commit). We're not sure if this needs to be rolled out to public sites though?