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Upgrading to Angular 10 + nebular 6 + Typescript 4.0.2 results in NbColumnDefDirective + NbTreeGridxxxxxDefDirective errors

See original GitHub issue

Issue type

I’m submitting a … (check one with “x”)

[ x ] bug report
feature request

Issue description

Current behavior: Upgrading current project based on Angular 9 + nebular 5 to Angular10 + nebular 6 results in the following errors during compilation.

ERROR in node_modules/@nebular/theme/components/cdk/table/cell.d.ts:35:5 - error TS2610: ‘name’ is defined as an accessor in class ‘CdkColumnDef’, but is overridden here in ‘NbColumnDefDirective’ as an instance property.

35     name: string;
       ~~~~
node_modules/@nebular/theme/components/cdk/table/cell.d.ts:39:5 - error TS2610: 'stickyEnd' is defined as an accessor in class 'CdkColumnDef', but is overridden here in 'NbColumnDefDirective' as an instance property.

39     stickyEnd: boolean;
       ~~~~~~~~~
node_modules/@nebular/theme/components/tree-grid/tree-grid-def.component.d.ts:19:9 - error TS2611: 'columns' is defined as a property in class 'NbRowDefDirective<T>', but is overridden here in 'NbTreeGridRowDefDirective<T>' as an accessor.

19     set columns(value: Iterable<string>);
           ~~~~~~~
node_modules/@nebular/theme/components/tree-grid/tree-grid-def.component.d.ts:34:9 - error TS2611: 'columns' is defined as a property in class 'NbHeaderRowDefDirective', but is overridden here in 'NbTreeGridHeaderRowDefDirective' as an accessor.

34     set columns(value: Iterable<string>);
           ~~~~~~~
node_modules/@nebular/theme/components/tree-grid/tree-grid-def.component.d.ts:49:9 - error TS2611: 'columns' is defined as a property in class 'NbFooterRowDefDirective', but is overridden here in 'NbTreeGridFooterRowDefDirective' as an accessor.

49     set columns(value: Iterable<string>);
           ~~~~~~~

Expected behavior: Upgrade should work seamlessly.

Other information:

npm, node, OS, Browser

node -v v12.18.2
npm -v 6.14.7

Angular, Nebular

    "@angular/animations": "^10.1.0",
    "@angular/common": "^10.1.0",
    "@angular/compiler": "^10.1.0",
    "@angular/core": "^10.1.0",
    "@angular/elements": "^10.1.0",
    "@angular/flex-layout": "^10.0.0-beta.32",
    "@angular/forms": "^10.1.0",
    "@angular/google-maps": "^9.1.0",
    "@angular/material": "^10.2.0",
    "@angular/platform-browser": "^10.1.0",
    "@angular/platform-browser-dynamic": "^10.1.0",
    "@angular/router": "^10.1.0",
    "@nebular/eva-icons": "^6.0.1",
    "@nebular/moment": "^6.0.1",
    "@nebular/security": "^6.0.1",
    "@nebular/theme": "^6.0.1",