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lit / lit-element

LEGACY REPO. This repository is for maintenance of the legacy LitElement library. The LitElement base class is now part of the Lit library, which is developed in the lit monorepo.
https://lit-element.polymer-project.org
BSD 3-Clause "New" or "Revised" License
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Upgrade to latest TypeScript version #1126

Closed sorvell closed 3 years ago

sorvell commented 3 years ago

Description

It appears that TypeScript 4.x is a bit stricter in typings and there are a few miscellaneous issues in the lit-element code base to fix.

Acceptance criteria

Land PR with upgraded TypeScript version.