See #272 (comment)

Refs #272

This reverts commit 9fdb47c.

Now that ASGI supports raw_path we don't need our own encoding scheme!

Datasette now uses ASGI internally, and no longer depends on Sanic.

It now uses Uvicorn as the underlying HTTP server.

This was thirteen months in the making... for full details see the issue:

#272

And for a full sequence of commits plus commentary, see the pull request:

#518

python tests/fixtures.py needs asgiref or it fails with an error

* Switch to ~= dependencies, closes #532
* Bump click and click-default-group
* imp. is deprecated, use types.ModuleType instead - thanks https://stackoverflow.com/a/32175781
* Upgrade to pytest 5

Closes #538

* extra_template_vars plugin hook

Closes #541

* Workaround for cwd bug

Based on pytest-dev/pytest#1235 (comment)

Thanks @glasnt!

Now it should be the same size on the homepage as it is on pages with breadcrumbs

Closes #563. Thanks, @chris48s

Closes #611

Following discussion in #601, this PR adds a "Format SQL" button to
read-only SQL (if the SQL actually differs from the formatting result).

It also removes a console error on readonly SQL queries.

Thanks, @rixx!

Closes #503 - thanks, @rixx

It previously used csvs-to-sqlite but that had heavy dependencies.

See https://support.glitch.com/t/can-you-upgrade-python-to-latest-version/7980/33