Currently there is an issue with TypeScript's newer version for mixed-in classes with functions returning 'this' because it generates TS2526 error in DTS file.
Once the issue is resolved within TypeScript, we will be able to shift to a latest version of TypeScript(v4.0.7+).
Currently there is an issue with TypeScript's newer version for mixed-in classes with functions returning 'this' because it generates TS2526 error in DTS file.
Once the issue is resolved within TypeScript, we will be able to shift to a latest version of TypeScript(v4.0.7+).