Add subpackages to build

Remove v4 branch from workflow

Also updates README link to anticipated 4.0 disucssion address.

Bump actions/cache from 3.0.2 to 3.0.3

Bumps [actions/cache](https://github.com/actions/cache) from 3.0.2 to 3.0.3.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v3.0.2...v3.0.3)

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

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

Bump actions/cache from 3.0.1 to 3.0.2

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

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

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

Attempt to fix Korean lunar calendar bug.

add py10 to the testing ci

Merge pull request gerrymanoim#133 from prerak-proof/master

Add US Juneteenth holiday to XNYS calendar starting in 2022

Merge pull request gerrymanoim#123 from philiptromans/xses-2022

Updated XSES for 2022

Add tutorials and overhaul README for 3.4 (gerrymanoim#106)

Overhauls `README.md` for 3.4.

Adds tutorials:
  - `minutes.ipynb`
  - `sessions.ipynb`
  - `calendar_properties.ipynb`
  - `calendar_methods.ipynb`
  - `trading_index.ipynb`

Also:
- Adds XETR and XTAE to calendars table.
- Corrects column alignment of calendar print.

Merge pull request gerrymanoim#76 from mixilchenko/xtks-failure

add recent xtks failure to adhoc holidays