[i304] Rename media-box to post

[geoff-wb]

Summary

• Updating styles as part of the rename from media-box to post
• A couple other classes also updated based on feedback

Submitter Checklist:

• Perform self-review (see reviewer checklist)
• Annotate MR with comments for reviewer
• Document any new patterns or features on peak-design-system
• Assign a team member who should specifically review this code
• Address reviewer feedback, if any, and assign back to reviewer

Reviewer Checklist:

• Version bump in package.json
• Visually review significant UI changes
• Assign @pez-wb as reviewer if needed
• Assign back to submitter with feedback

[geoff-wb]

Not sure if this was necessary. I also bumped the version number in the peak docs

[travis-wb]

pretty sure it is necessary, because it's an NPM package and I don't think NPM wants you to publish the same version twice.

[pez-work]

this is why the build errors are happening. you best bet is to keep this at the latest version until the peak-style branch w/ your updates have been merged and deployed.

Until then just make a note in the PR description that it relies on a yarn link to your peak-style branch (include PR link).

[pez-work]

wrong PR for my comment — should apply to the PDS "@wealthbar/peak-style" dependency

[pez-work]

some cleanup suggestions

[pez-work]

this is why the build errors are happening. you best bet is to keep this at the latest version until the peak-style branch w/ your updates have been merged and deployed.

Until then just make a note in the PR description that it relies on a yarn link to your peak-style branch (include PR link).