fix: return QrCodeModule to avoid breaking change (#109)

As suggested in
#106 (comment)
bring back the `QrCodeModule` as a deprecated symbol to maintain
backwards compatibility

feat!: update to angular 19 (#106)

- updates to angular 19
- **BREAKING CHANGE** removes the use of `NgModule` and makes the
components / directives `standalone: true`

fix: base path needed on gh-pages when not using a custom domain (#98)

chore: update docs for v17

chore: refresh dependencies (#78)

fix: re-draw already loaded center images on change (#71)

* fix: re-draw already loaded center images on change

previously if the image was already loaded, changing the value of the QR
code would make it disappear.

this change fixes that by immediately drawing the image if the complete
property is true

may help with #64 - although as reported that was essentially the
reverse of this situation :/

ref:
- https://developer.mozilla.org/en-US/docs/Web/API/HTMLImageElement/complete

* chore: update version/changelog

feat: support angular 15 (#70)

* chore: refresh yarn.lock
* chore: nodejs v18
* chore: upgrade typescript
* chore: ng update @angular/core@15 @angular/cli@15 --force
* chore: upgrade linting packages
* chore: upgrade jasmine
* feat: clean-up stuff no longer required in angular 15
* chore: upgrade zone.js, node types
* chore: update version ranges
* chore: update docs

chore: update dependency ranges, readme and changelog (#63)

feat: support angular 13 (#44)

* chore: run upgrade command

```
$ npx @angular/cli@13 update @angular/core@13 @angular/cli@13 @angular-eslint/builder @angular-eslint/schematics
```

* chore: ng lint --fix

* chore: refresh dependencies

* chore: bump version and changelog

* chore: ci uses nodejs 16.x

chore: bump version for 5.2.0