Update to tslib v2

[cyrilletuzi]

🐞 bug report

Description

According to the upgrade to TypeScript 3.9 in last v10 beta, Angular should upgrade to tslib v2 (releases notes) and requires v2 as minimum peerDependency.

This is especially important in ng g library schematics, to avoid library authors to have to support multiple tslib versions, with potentially unexpected issues.

Related issue in Angular repo: angular/angular#37188

[alan-agius4]

Hi @cyrilletuzi,

We are aware of this and we are working on this. Tslib update to version 2 is breaking and requires a number of changes across the board.

This is currently being tracked in TOOL-1374

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