bump 0.3.7 -> 0.4.0

Support for easy testing.

bump 0.3.5 -> 0.3.6

No changes, just removing a single dbg! statement that should have been
removed earlier.

bump 0.3.4 -> 0.3.5

No API changes, but the underlying cache mechanism no longer depends on
SQLite. The backing http-library has also been changed to a more minimal
one, removing the entire tokio-stack.

The net result is drastically reduced build times. Combine this with
sccache, and aocd will be more or less invisible.

bump 0.3.3 -> 0.3.4

simplify what types submit! accepts

Anything that can be Display-ed is accepted. This should cover numbers,
Strings and &str just the same. Internally the answer is just treated as a &str from that point on.

bump 0.3.1 -> 0.3.2

Also bump aocd-proc 0.3.0 -> 0.3.1

bump 0.3.0 -> 0.3.1

Make use of aocd-proc 0.3.0.

bump version 0.2.6 -> 0.3.0

Changes:

- Allow setting token and cache directory with environment variables.
- Store inputs and answers by session token. To allow using different
  profiles. Will cause cache invalidations once people get a new token,
  but that's typically once a month, i.e. once a year. That's a decent
  trade off.

remove a single trailing newline from inputs

This seems to be added by the way the input is read from the http
request. This way of removing it _should_ be fine and tries to account
for potential different types of line endings.

ensure doc tests don't fail for aocd-proc

They where failing because the example showed the use of it, which
really depends on aocd, which of course is not available from within
aocd-proc. Just ignoring the example from tests works.