Fix many ESlint errors (#1265)

* Unvendor toml package

* Fix many ESlint errors

For mysterious reasons, these errors appear on my branch #1262 even
though they are not related to changes there. The eslint config seems
a bit unstable.

Anyways this fixes them.

* Put back Record

* Fix typescript compilation

* Fix lints

* Try @iarna/toml instead

* Fix import

* Use @ltd/j-toml

* Update test

* Use toml-j0.4

* Some changes

* Fix toml import

* Try adding eslint gha job

* Add forgotten checkout action

* Force CI to run

* Blah

* Fix

* Revert changes to github workflow

* Fix lints

* wget toml-j0.4 type definitions

* Add toml-j types workaround to eslint workflow

* Apply formatter

* Use @hoodmane/toml-j0.4

* Import from @hoodmane/toml-j0.4

pyscriptjs/src/utils.ts

@@ -117,7 +117,7 @@ export function createSingularWarning(msg: string, sentinelText: string | null =
  * @returns A new asynchronous lock
  * @private
  */
-export function createLock() {
+export function createLock(): () => Promise<() => void> {
     // This is a promise that is resolved when the lock is open, not resolved when lock is held.
     let _lock = Promise.resolve();