Bump Fronter.NET from 3bfed64 to a2588f6 (#2286)

Bumps
[Fronter.NET](https://github.com/ParadoxGameConverters/Fronter.NET) from
`3bfed64` to `a2588f6`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/ParadoxGameConverters/Fronter.NET/commit/a2588f67dc5aeb72ef9d13babd79b09056801f62"><code>a2588f6</code></a>
Bump PGCG.commonItems from 14.1.4 to 15.0.1 in /Fronter.NET (<a
href="https://redirect.github.com/ParadoxGameConverters/Fronter.NET/issues/643">#643</a>)</li>
<li><a
href="https://github.com/ParadoxGameConverters/Fronter.NET/commit/e1a9f03aea22cd8580277ad888c03d5eff77d79b"><code>e1a9f03</code></a>
Bump Meziantou.Analyzer from 2.0.172 to 2.0.173 in /Fronter.NET (<a
href="https://redirect.github.com/ParadoxGameConverters/Fronter.NET/issues/644">#644</a>)</li>
<li>See full diff in <a
href="https://github.com/ParadoxGameConverters/Fronter.NET/compare/3bfed64658f55f449927f466cb7fc25cd0067586...a2588f67dc5aeb72ef9d13babd79b09056801f62">compare
view</a></li>
</ul>
</details>
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