Bump com.mixpanel:mixpanel-java from 1.5.2 to 1.5.3

Bumps [com.mixpanel:mixpanel-java](https://github.com/mixpanel/mixpanel-java) from 1.5.2 to 1.5.3.
- [Release notes](https://github.com/mixpanel/mixpanel-java/releases)
- [Commits](mixpanel/mixpanel-java@mixpanel-java-1.5.2...mixpanel-java-1.5.3)

---
updated-dependencies:
- dependency-name: com.mixpanel:mixpanel-java
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

build.gradle

@@ -37,7 +37,7 @@ dependencies {
     implementation 'com.jcraft:jsch:0.1.55'
     implementation 'org.springframework.shell:spring-shell-starter:3.2.4'
     implementation 'org.springframework.boot:spring-boot-starter-actuator'
-    implementation("com.mixpanel:mixpanel-java:1.5.2")
+    implementation("com.mixpanel:mixpanel-java:1.5.3")
     implementation group: 'ch.qos.logback', name: 'logback-classic', version: '1.5.6'
     implementation group: 'ch.qos.logback.contrib', name: 'logback-json-classic', version: '0.1.5'
     implementation group: 'ch.qos.logback.contrib', name: 'logback-jackson', version: '0.1.5'