fix: pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-COMSQUAREUPOKIO-5820002
- https://snyk.io/vuln/SNYK-JAVA-ORGJETBRAINSKOTLIN-2393744
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-2823313
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-3369749
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-3369852
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-5422217
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-6261586
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-6444790
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-6597980

Author: snyk-bot

pom.xml

@@ -65,7 +65,7 @@
 
         <servlet.version>3.0.1</servlet.version>
         <spring-test.version>5.3.18</spring-test.version>
-        <spring-beans.version>5.3.19</spring-beans.version>
+        <spring-beans.version>5.3.34</spring-beans.version>
         <atlassian-plugins-core.version>3.0.15</atlassian-plugins-core.version>
         <atlassian-plugins-webfragment.version>3.0.1</atlassian-plugins-webfragment.version>
         <atlassian-user.version>3.0</atlassian-user.version>
@@ -125,7 +125,7 @@
             <dependency>
                 <groupId>com.github.seratch</groupId>
                 <artifactId>jslack</artifactId>
-                <version>1.5.6</version>
+                <version>1.6.0</version>
                 <exclusions>
                     <exclusion>
                         <artifactId>slf4j-api</artifactId>