lib/client: fix typo

That one turned out to be surprisingly tricky to dig out.

lib/client: bind handleOnline to this

It's used as a callback to removeEventListener().

ci: temporarily switch to alpine/edge

It has a more up-to-date nodejs version which doesn't deadlock in
"npm install".

lib/client: don't throttle reconnections if opened long ago

If a connection was opened a long time ago, and recently got broken,
try to reconnect immediately.

client: reconnect immediately if network comes online during backoff

readme: move to Codeberg

ci: use new SSH key for deployments

components/composer: add support for multiple file upload

components/composer: handle drag and drop file upload

lint: turn on @stylistic/js/arrow-parens

lint: turn on @stylistic/js/comma-dangle

lint: turn on @stylistic/js/semi

ci: fail when ESLint reports warnings

Wire up stylistic to ESLint

Remove two remaining single quote strings

Disallow var keyword

eslint: fix global ignore for dist/

Update dependencies

eslint: ignore dist/ directory

Add ESLint