Angular 11 upgrade

[berezovskyi]

I upgraded everything I could as per instructions. Mostly working, some CSS layout was negatively affected:

vs

I think the main problem now is

> [email protected] create-preview-schema
> ts-json-schema-generator --type Preview --tsconfig ./tsconfig.json --path "./src/app/preview/models.ts" > src/preview-schemas.json

Error: home/runner/work/lyo.oslc-ui/lyo.oslc-ui/node_modules/@types/eslint/index.d.ts(607,38): error TS2694: Namespace '"/home/runner/work/lyo.oslc-ui/lyo.oslc-ui/node_modules/@types/estree/index"' has no exported member 'StaticBlock'.
Error: home/runner/work/lyo.oslc-ui/lyo.oslc-ui/node_modules/@types/eslint/index.d.ts(608,45): error TS2694: Namespace '"/home/runner/work/lyo.oslc-ui/lyo.oslc-ui/node_modules/@types/estree/index"' has no exported member 'StaticBlock'.
Error: home/runner/work/lyo.oslc-ui/lyo.oslc-ui/node_modules/@types/eslint/index.d.ts(900,81): error TS2574: A rest element type must be an array type.
Error: Process completed with exit code 1.