feat: delay hiding the overlay (#418)

fix: fix pretest (#417)

ci: use token env vars (#406)

chore(deps): update dependency @types/node to v13.13.51

fix: exclude end position in findElementWithOffset (#366)

fix(deps): update dependency sourcegraph to v25

feat: support highlighting tokens by range (#331)

feat: document highlights (#278)

feat: allow hover providers to communicate loading state (#251)

This information is then used to make the loading indicator logic smarter - it now shows a loader even if the provider had emitted an empty result before, given that the LOADER_DELAY has elapsed.

BREAKING CHANGE: Hover providers that return Subscribables MUST
communicate loading state.
If the hover provider only emits a single result, it can return a
Promise instead.

feat: reduce LOADER_DELAY to 600 (#244)

As discussed in the web sync and in https://docs.google.com/document/d/1TPTH33vOVXqhKgVEeohnZh1sZA02M_hfZVx0YBvX5QI/edit