fix(deps): Update dependency nl.jqno.equalsverifier:equalsverifier to v3.19.1 (#322)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [nl.jqno.equalsverifier:equalsverifier](https://www.jqno.nl/equalsverifier) ([source](https://redirect.github.com/jqno/equalsverifier)) | dependencies | minor | `3.18.1` -> `3.19.1` |

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### Release Notes

<details>
<summary>jqno/equalsverifier (nl.jqno.equalsverifier:equalsverifier)</summary>

### [`v3.19.1`](https://redirect.github.com/jqno/equalsverifier/blob/HEAD/CHANGELOG.md#3191---2025-02-17)

##### Added

-   Prefab value for `java.util.concurrent.locks.ReentrantLock`. ([Issue 981](https://redirect.github.com/jqno/equalsverifier/issues/981))

##### Fixed

-   Bug in `withPrefabValueForField` where in some cases the prefab value is not used.

### [`v3.19`](https://redirect.github.com/jqno/equalsverifier/blob/HEAD/CHANGELOG.md#3191---2025-02-17)

##### Added

-   Prefab value for `java.util.concurrent.locks.ReentrantLock`. ([Issue 981](https://redirect.github.com/jqno/equalsverifier/issues/981))

##### Fixed

-   Bug in `withPrefabValueForField` where in some cases the prefab value is not used.

### [`v3.18.2`](https://redirect.github.com/jqno/equalsverifier/blob/HEAD/CHANGELOG.md#3182---2025-01-30)

##### Fixed

-   Gives readable error message when trying to use `forPackage()` on third-party dependency package, instead of a `NullPointerException`. ([Issue 1040](https://redirect.github.com/jqno/equalsverifier/issues/1040))

</details>

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Author: cq-bot

Diff for: lib/build.gradle

@@ -55,7 +55,7 @@ dependencies {
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.11.4'
     testImplementation 'org.mockito:mockito-core:5.15.2'
     testImplementation 'org.mockito:mockito-junit-jupiter:5.15.2'
-    testImplementation 'nl.jqno.equalsverifier:equalsverifier:3.18.1'
+    testImplementation 'nl.jqno.equalsverifier:equalsverifier:3.19.1'
     testImplementation 'org.assertj:assertj-core:3.27.3'
     testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.11.4'