Here are a list of style changes made for problems 1-16:
* 2: Centered text
* 6: Centered text and `<sup>` tags
* 8: Centered text
* 9: Centered text, `<var>`, and `<sup>` tags
* 11: Centered text and spacing between number grid and next paragraph
* 12: Tab spacing (padding-left: 4em)
* 14: Centered text, `<var>` tags, and tab spacing (padding-left: 4em)
* 16: `<sup>` tags
BREAKING CHANGE: None
Here's a list of style changes made for problems 17-26:
*17: Bold tags
*18: Bold tags
*19: ul and li tags for leap year information
*20: var tags and line break
*21: var tags
*22: added code tag
*23: var tags
*24: centered text and var tag
*25: sup tags, tab-like spacing, and CSS grid for spacing
*26: sub, sup, and var tags, and CSS grid for spacing
BREAKING CHANGE: None
This PR allows us to validate the schema during test.
It also removes some cruft from the seed files and ensures only the required data is packaged and consumable, reducing the package weight somewhat.
