Update pre commit 2.7.1 to 2.8.1 (and other minor libraries updates)

[rapejim]

This PR updates pre-commit from 2.7.1 to 2.8.1.

Changelog

2.8.1

==================

Fixes
- Allow default `language_version` of `system` when the homedir is `/`
 - 1669 PR by asottile.

2.8.0

==================

Features
- Update `rbenv` / `ruby-build`
 - 1612 issue by tdeo.
 - 1614 PR by asottile.
- Update `sample-config` versions
 - 1611 PR by mcsitter.
- Add new language: `dotnet`
 - 1598 by rkm.
- Add `--negate` option to `language: pygrep` hooks
 - 1643 PR by MarcoGorelli.
- Add zipapp support
 - 1616 PR by asottile.
- Run pre-commit through https://pre-commit.ci
 - 1662 PR by asottile.
- Add new language: `coursier` (a jvm-based package manager)
 - 1633 PR by JosephMoniz.
- Exit with distinct codes: 1 (user error), 3 (unexpected error), 130 (^C)
 - 1601 PR by int3l.

Fixes
- Improve `healthy()` check for `language: node` + `language_version: system` hooks when the system executable goes missing.
 - pre-commit/action45 issue by KOliver94.
 - 1589 issue by asottile.
 - 1590 PR by asottile.
- Fix excess whitespace in error log traceback
 - 1592 PR by asottile.
- Fix posixlike shebang invocations with shim executables of the git hook script on windows.
 - 1593 issue by Celeborn2BeAlive.
 - 1595 PR by Celeborn2BeAlive.
- Remove hard-coded `C:\PythonXX\python.exe` path on windows as it caused confusion (and `virtualenv` can sometimes do better)
 - 1599 PR by asottile.
- Fix `language: ruby` hooks when `--format-executable` is present in a gemrc
 - issue by `Rainbow Tux` (discord).
 - 1603 PR by asottile.
- Move `cygwin` / `win32` mismatch error earlier to catch msys2 mismatches
 - 1605 issue by danyeaw.
 - 1606 PR by asottile.
- Remove `-p` workaround for old `virtualenv`
 - 1617 PR by asottile.
- Fix `language: node` installations to not symlink outside of the environment
 - pre-commit-ci/issues2 issue by DanielJSottile.
 - 1667 PR by asottile.
- Don't identify shim executables as valid `system` for defaulting `language_version` for `language: node` / `language: ruby`
 - 1658 issue by adithyabsk.
 - 1668 PR by asottile.

Links

• PyPI: https://pypi.org/project/pre-commit
• Changelog: https://pyup.io/changelogs/pre-commit/
• Repo: https://github.com/pre-commit/pre-commit

Other updates on Pipfile.lock

• Updated boto3 from 1.16.5 to 1.16.8
• Updated botcore from 1.19.5 to 1.19.8
• Updated cryptography from 3.2 to 3.2.1
• Updated pytest from 6.1.1 to 6.1.2
• Updated regex from 2020.10.23 to 2020.10.28

[coveralls]

Coverage remained the same at 86.667% when pulling f73de32 on update-pre-commit-2.7.1-to-2.8.1 into 266c7a7 on master.