update to angular 13

[dfa1234]

library build with ng-packagr

[dfa1234]

#55 Hi here what I propose

[bergben]

Nice @dfa1234 thanks!

Did you test the library? Want to release a new version?

[bergben]

A new Demo on Plunkr (or now rather Stackblitz) would be nice? See readme

[dfa1234]

@bergben You are perfectly right, before all I wanted to prepare a demo on stackblitz. I hope there will be no regression!

For you question on ng2-pica, the problem is that I could not do npm i ng2-pica in this project anymore. I think the problem is that ng2-pica need to be upgraded as well with the new angular. To move quicker I simply took your service from ng2-pica and moved it here, made some upgrade on the script (typescript related) and imported pica directly. It's the main change I did in the source code.

I keep you updated when I have a stackbliz working, but I'm also very short on time likely, I expect to work on it next week.