Add more Player stats constants

[mkreiser]

Many of these were discovered through @cwendt94 's work on their project

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (af6f441) 100.00% compared to head (d1b8b19) 100.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #237 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 14 14 Lines 266 266 Branches 43 43 ========================================= Hits 266 266 ``` | [Files](https://app.codecov.io/gh/mkreiser/ESPN-Fantasy-Football-API/pull/237?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Mike+Kreiser) | Coverage Δ | | |---|---|---| | [src/constants.js](https://app.codecov.io/gh/mkreiser/ESPN-Fantasy-Football-API/pull/237?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Mike+Kreiser#diff-c3JjL2NvbnN0YW50cy5qcw==) | `100.00% <ø> (ø)` | | | [src/player-stats/player-stats.js](https://app.codecov.io/gh/mkreiser/ESPN-Fantasy-Football-API/pull/237?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Mike+Kreiser#diff-c3JjL3BsYXllci1zdGF0cy9wbGF5ZXItc3RhdHMuanM=) | `100.00% <ø> (ø)` | |

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