Bump pyexiv2 from 2.11.0 to 2.12.0 (#366)

Bumps [pyexiv2](https://github.com/LeoHsiao1/pyexiv2) from 2.11.0 to
2.12.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/LeoHsiao1/pyexiv2/releases">pyexiv2's
releases</a>.</em></p>
<blockquote>
<h2>v2.12.0</h2>
<ul>
<li>[feature] add copy_to_another_image() . See the <a
href="https://github.com/LeoHsiao1/pyexiv2/blob/master/docs/Tutorial.md#copy_xx">tutorial</a>
for details.</li>
<li>[feature] support write duplicate exif key (Issue <a
href="https://redirect.github.com/LeoHsiao1/pyexiv2/issues/133">#133</a>
)</li>
<li>[lib] update exiv2 from 0.27.7 to v0.28.1 (Issue <a
href="https://redirect.github.com/LeoHsiao1/pyexiv2/issues/132">#132</a>
)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/LeoHsiao1/pyexiv2/commit/723c435258c84f1822581e7d34286b6674cb1426"><code>723c435</code></a>
Merge pull request <a
href="https://redirect.github.com/LeoHsiao1/pyexiv2/issues/136">#136</a>
from LeoHsiao1/dev</li>
<li><a
href="https://github.com/LeoHsiao1/pyexiv2/commit/30e5b7a5b17dabb0c6c1dc4b516df7ec4a04e751"><code>30e5b7a</code></a>
[lib] update exiv2 library files to v0.28.1</li>
<li><a
href="https://github.com/LeoHsiao1/pyexiv2/commit/ceb94988b20ee9ff63bf3fb0d059f333b2d0155e"><code>ceb9498</code></a>
[ci] ready to release v2.12.0</li>
<li><a
href="https://github.com/LeoHsiao1/pyexiv2/commit/899af85fa4714564c08f105f9924da47642b6855"><code>899af85</code></a>
[lib] update compiled files</li>
<li><a
href="https://github.com/LeoHsiao1/pyexiv2/commit/9d3b8be9130ef42c1a625de54b8d09bb04ec332b"><code>9d3b8be</code></a>
[doc] install inih on MacOS</li>
<li><a
href="https://github.com/LeoHsiao1/pyexiv2/commit/d199abdc0ed750de741ffa45887281a57b43ec1f"><code>d199abd</code></a>
[doc] add docs about copy_xx()</li>
<li><a
href="https://github.com/LeoHsiao1/pyexiv2/commit/132269429b86cba586ddc71ec71db7f682860749"><code>1322694</code></a>
[ci] install inih on MacOS</li>
<li><a
href="https://github.com/LeoHsiao1/pyexiv2/commit/2d915fdb949f18e081e710ae30418d3afd8b2320"><code>2d915fd</code></a>
[ci] install inih on MacOS</li>
<li><a
href="https://github.com/LeoHsiao1/pyexiv2/commit/adc4d14ec4fff41f59b820f2f09dfb6971d9ed2e"><code>adc4d14</code></a>
[test] add test_copy_to_another_image()</li>
<li><a
href="https://github.com/LeoHsiao1/pyexiv2/commit/9ad469018dffd6495ee024f5987143d209214b9c"><code>9ad4690</code></a>
[lib] copy thumbnail before copying exif</li>
<li>Additional commits viewable in <a
href="https://github.com/LeoHsiao1/pyexiv2/compare/v2.11.0...v2.12.0">compare
view</a></li>
</ul>
</details>
<br />


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</details>