Describe the bug
AOT compilation build under Angular 9 with angularCompilerOptions.strictTemplates: true in tsconfig.app.json generates a error TS2322: Type 'string' is not assignable to type 'number' when binding <as-split-area [size]="'*'">, as the @Input size is typed as number | null in the source code, though the documentation clearly states it can also be bound to '*' in pixel mode.