Rename `company_id` to `companies_id` in a backward compatible way

Closes #9

The column company_id is now deprecated in all toy_*companies(). The latest data uses companies_id and is available to you automatically when you update the tiltIndicator package.

TODO

[x] Link related issue/PR.
[x] Describe the goal of the PR. Avoid details that are clear in the diff.
[x] Mark the PR as draft.
[x] Include a unit test.
[x] Review your own PR in "Files changed".
[x] Ensure the PR branch is updated.
[x] Ensure the checks pass.
[x] Change the status from draft to ready.
[x] Polish the PR title and description.
[x] Assign a reviewer.

EXCEPTIONS

[ ] Slide here any item that you intentionally choose to not do.

2DegreesInvesting / tiltToyData

Rename `company_id` to `companies_id` in a backward compatible way #10