Update README to clarify library stability and versioning

Bump golang.org/x/crypto from 0.14.0 to 0.31.0 in /v2

Bumps [golang.org/x/crypto](https://github.com/golang/crypto) from 0.14.0 to 0.31.0.
- [Commits](golang/crypto@v0.14.0...v0.31.0)

---
updated-dependencies:
- dependency-name: golang.org/x/crypto
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Bump golang.org/x/net from 0.27.0 to 0.33.0 in /v2

Bumps [golang.org/x/net](https://github.com/golang/net) from 0.27.0 to 0.33.0.
- [Commits](golang/net@v0.27.0...v0.33.0)

---
updated-dependencies:
- dependency-name: golang.org/x/net
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Detect and set proper Content-Type for avatars

Detect proper avatar type to return instead of returning `image/*`,
which is not valid.

Merge pull request #218 from go-pkgz/paskal/plain_text

Fix Content-Type at /logout endpoint

Merge pull request #205 from go-pkgz/paskal/v2_jwt5

Update jwt package from v3 to v5

Merge pull request #199 from go-pkgz/paskal/update_modules

Update go modules, CI actions, fix golangci-lint errors

Merge pull request #191 from vladimirdulov/master

bump the email module to v0.5.0 version

check if user's provider is in the list of current providers (#176)

make Apple ResponseMode configurable