Bump com.google.errorprone:error_prone_core from 2.37.0 to 2.39.0

Bumps [com.google.errorprone:error_prone_core](https://github.com/google/error-prone) from 2.37.0 to 2.39.0.
- [Release notes](https://github.com/google/error-prone/releases)
- [Commits](google/error-prone@v2.37.0...v2.39.0)

---
updated-dependencies:
- dependency-name: com.google.errorprone:error_prone_core
  dependency-version: 2.39.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

build.gradle

@@ -97,7 +97,7 @@ dependencies {
     jmh 'org.openjdk.jmh:jmh-generator-annprocess:1.37'
 
     errorprone 'com.uber.nullaway:nullaway:0.12.7'
-    errorprone 'com.google.errorprone:error_prone_core:2.37.0'
+    errorprone 'com.google.errorprone:error_prone_core:2.39.0'
 
     // just tests
     testCompileOnly 'org.jetbrains.kotlin:kotlin-stdlib-jdk8'