enable reusing records in csv/tsv detection (gabriel-vasile#443)

This change should help with allocations, but ideally there would be no
allocations when detecting csv. For that to happen the detection needs
to move from using stdlib csv reader to something else.

Bump golang.org/x/net from 0.7.0 to 0.8.0 (gabriel-vasile#367)

Bumps [golang.org/x/net](https://github.com/golang/net) from 0.7.0 to 0.8.0.
- [Release notes](https://github.com/golang/net/releases)
- [Commits](golang/net@v0.7.0...v0.8.0)

---
updated-dependencies:
- dependency-name: golang.org/x/net
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Upgrade golang.org/x/net dependency (gabriel-vasile#365)

Bump actions/checkout from 3.0.1 to 3.0.2 (gabriel-vasile#279)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.0.1 to 3.0.2.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3.0.1...v3.0.2)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

add html utf8 bom signature (gabriel-vasile#268)

* detect HTML with utf8 BOM signature; closes gabriel-vasile#267
* make BOM have priority over HTML meta in charset detection: gabriel-vasile#268 (comment) 

Co-authored-by: Gabriel Vasile <[email protected]>

Merge pull request gabriel-vasile#188 from gabriel-vasile/utf-control…

…-chars

Exclude weird control characters from valid utf8 text/plain

Check for EOF in DetectReader; for gabriel-vasile#162

Before v1.2.0, DetectReader returned text/plain for empty inputs.
After v1.2.0, it started returning EOF error.
This commit changes DetectReader behavior to how it was before v1.2.0

Make readme shorter

Enable race detector in tests

Docs improvements