Bump guava from 27.1-jre to 30.0-jre

Bumps [guava](https://github.com/google/guava) from 27.1-jre to 30.0-jre.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/google/guava/releases">guava's releases</a>.</em></p>
<blockquote>
<h2>30.0</h2>
<h3>Maven</h3>
<pre lang="xml"><code>&lt;dependency&gt;
  &lt;groupId&gt;com.google.guava&lt;/groupId&gt;
  &lt;artifactId&gt;guava&lt;/artifactId&gt;
  &lt;version&gt;30.0-jre&lt;/version&gt;
  &lt;!-- or, for Android: --&gt;
  &lt;version&gt;30.0-android&lt;/version&gt;
&lt;/dependency&gt;
</code></pre>
<h3>Javadoc</h3>
<ul>
<li><a href="http://guava.dev/releases/30.0-jre/api/docs/">30.0-jre</a></li>
<li><a href="http://guava.dev/releases/30.0-android/api/docs/">30.0-android</a></li>
</ul>
<h3>JDiff</h3>
<ul>
<li><a href="http://guava.dev/releases/30.0-jre/api/diffs/">30.0-jre vs. 29.0-jre</a></li>
<li><a href="http://guava.dev/releases/30.0-android/api/diffs/">30.0-android vs. 29.0-android</a></li>
<li><a href="http://guava.dev/releases/30.0-android/api/androiddiffs/">30.0-android vs. 30.0-jre</a></li>
</ul>
<h3>Changelog</h3>
<ul>
<li><a href="https://groups.google.com/d/msg/guava-announce/zHZTFg7YF3o/rQNnwdHeEwAJ">Guava types can no longer be sent over GWT-RPC.</a> Even the earlier, temporary way to reenable support (<code>guava.gwt.emergency_reenable_rpc</code>) no longer has an effect. (0cb89dd110)</li>
<li><code>cache</code>: Fixed memory leak in <code>LocalCache</code> under <a href="https://developers.google.com/j2objc">j2objc</a>. (5e519d91d0)</li>
<li><code>collect</code>: Added two-element <code>min</code> and <code>max</code> methods to <code>Comparators</code>. (958186c071)</li>
<li><code>collect</code>: Removed <code>@beta</code> from <code>Multimaps.toMultimap</code>. (b6b4dc49b1)</li>
<li><code>collect</code>: Made the set returned by <code>ImmutableMap&lt;K, V&gt;.keySet()</code> serializable as long as <code>K</code> is serializable, even if <code>V</code> is not (and similarly for <code>values()</code>). (f5a69c33fc)</li>
<li><code>collect</code>: Fixed bug in <code>powerSet.equals(otherPowerSet)</code> would erroneously return <code>false</code> if the two power sets' underlying sets were equal but had a different iteration order. (215b1f0dd7)</li>
<li><code>collect</code>: Eliminated <a href="https://developers.google.com/j2objc">j2objc</a> retain-cycle in <code>SingletonImmutableBiMap</code>. (0ad38b88bd)</li>
<li><code>eventbus</code>: Prevented <code>@subscribe</code> from being applied to a method that takes a primitive, as that will never be called. (554546c971)</li>
<li><code>graph</code>: Made <code>Traverser.breadthFirst()</code> lazier, and optimized <code>Traverser</code> more generally. (32f2d770f7, b5210ca95c)</li>
<li><code>graph</code>: Added <code>@DoNotMock</code> to <code>Traverser</code>. (6410f18c06)</li>
<li><code>io</code>: Deprecated <code>Files.createTempDir()</code>. (fec0dbc463) (CVE forthcoming)</li>
<li><code>io</code>: Upgraded <code>ByteStreams.copy(InputStream, OutputStream)</code> to use the faster <code>FileChannel</code> if possible. (a1e9a0bd12)</li>
<li><code>math</code>: Added <code>roundToDouble</code> to <code>BigDecimalMath</code>, <code>BigIntegerMath</code>, and <code>LongMath</code>. (bee4f3c7ed, 2b5c096ddf, 633abf2c62)</li>
<li><code>net</code>: Added <code>MediaType</code> constants for several font/ types. (571cf66bac)</li>
<li><code>net</code>: Added <code>HttpHeaders</code> constants for <code>Cross-Origin-Embedder-Policy(-Report-Only)?</code>. (c3bf73187a)</li>
<li><code>testing</code>: Made <code>EqualsTester</code> test that non-<code>String</code> objects are not equal to their <code>String</code> representations. (c9570eae69)</li>
<li><code>util.concurrent</code>: Added <code>ClosingFuture</code>. (52e048ed6c)</li>
<li><code>util.concurrent</code>: Removed the deprecated 1-arg <code>ServiceManager.addListener(Listener)</code>. Use the 2-arg <code>addListener(Listener, Executor)</code> overload, setting the executor to <code>directExecutor()</code> for equivalent behavior. (dfb0001714)</li>
<li><code>util.concurrent</code>: Changed <code>AbstractFuture.toString()</code> to no longer include the <code>toString()</code> of the result. (2ebf27fd45)</li>
<li><code>util.concurrent</code>: Added <code>awaitTerminationUninterruptibly</code>. (f07b9540dc)</li>
</ul>
<h2>29.0</h2>
<h3>Maven</h3>
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</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a href="https://github.com/google/guava/commits">compare view</a></li>
</ul>
</details>
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</details>

Fixes #206

COPYBARA_INTEGRATE_REVIEW=#206 from google:dependabot/maven/com.google.guava-guava-30.0-jre f33d1c2
PiperOrigin-RevId: 337913517

Author: dependabot[bot]

pom.xml

@@ -66,7 +66,7 @@
     <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
-      <version>27.1-jre</version>
+      <version>30.0-jre</version>
     </dependency>
     <dependency>
       <groupId>com.google.code.findbugs</groupId>