Bump Fronter.NET from e773ca9 to 6720364 (#2420)

Bumps
[Fronter.NET](https://github.com/ParadoxGameConverters/Fronter.NET) from
`e773ca9` to `6720364`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/ParadoxGameConverters/Fronter.NET/commit/6720364501b1781755ccf9df4d29a3c2f4978e3d"><code>6720364</code></a>
Bump xunit.runner.visualstudio from 3.0.0 to 3.0.1 in /Fronter.NET.Tests
(<a
href="https://redirect.github.com/ParadoxGameConverters/Fronter.NET/issues/749">#749</a>)</li>
<li><a
href="https://github.com/ParadoxGameConverters/Fronter.NET/commit/77be0b2e6ecb814b6c87dbb34ded5b3c57a9b01f"><code>77be0b2</code></a>
Bump xunit from 2.9.2 to 2.9.3 in /Fronter.NET.Tests (<a
href="https://redirect.github.com/ParadoxGameConverters/Fronter.NET/issues/747">#747</a>)</li>
<li><a
href="https://github.com/ParadoxGameConverters/Fronter.NET/commit/e4420d0674ea93397cf94648fe458d3c8d08db87"><code>e4420d0</code></a>
Bump PGCG.commonItems from 15.1.2 to 15.1.3 in /Fronter.NET (<a
href="https://redirect.github.com/ParadoxGameConverters/Fronter.NET/issues/744">#744</a>)</li>
<li><a
href="https://github.com/ParadoxGameConverters/Fronter.NET/commit/2f3228448d6aa062d73f9becd4ac58d0fa816652"><code>2f32284</code></a>
Bump AWSSDK.S3 from 3.7.411.4 to 3.7.411.5 in /Fronter.NET (<a
href="https://redirect.github.com/ParadoxGameConverters/Fronter.NET/issues/745">#745</a>)</li>
<li><a
href="https://github.com/ParadoxGameConverters/Fronter.NET/commit/8e2d0ad50ea026e2540ca94b6b75d9afc96613d5"><code>8e2d0ad</code></a>
Bump Meziantou.Analyzer from 2.0.185 to 2.0.186 in /Fronter.NET (<a
href="https://redirect.github.com/ParadoxGameConverters/Fronter.NET/issues/743">#743</a>)</li>
<li>See full diff in <a
href="https://github.com/ParadoxGameConverters/Fronter.NET/compare/e773ca9cc4d382e686c8d31fe6c429d0a029f10a...6720364501b1781755ccf9df4d29a3c2f4978e3d">compare
view</a></li>
</ul>
</details>
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