Update dependency org.yaml:snakeyaml to v2

build.gradle

@@ -96,7 +96,7 @@ dependencies {
     api 'commons-io:commons-io:2.22.0'
 
     // Config management
-    api 'org.yaml:snakeyaml:1.33'
+    api 'org.yaml:snakeyaml:2.6'
 
     // Dependencies from old Matrix-java-sdk
     api 'org.apache.commons:commons-lang3:3.20.0'
@@ -135,7 +135,7 @@ dependencies {
     api 'org.xerial:sqlite-jdbc:3.53.2.0'
 
     // PostgreSQL
-    api 'org.postgresql:postgresql:42.7.12'
+    api 'org.postgresql:postgresql:42.7.13'
 
     // MariaDB/MySQL
     api 'org.mariadb.jdbc:mariadb-java-client:3.5.9'
@@ -150,7 +150,7 @@ dependencies {
     api 'com.sendgrid:sendgrid-java:4.10.3'
 
     // ZT-Exec for exec identity store
-    api 'org.zeroturnaround:zt-exec:1.12'
+    api 'org.zeroturnaround:zt-exec:1.13.0'
 
     // HTTP server
     api 'io.undertow:undertow-core:2.4.2.Final'
@@ -161,7 +161,7 @@ dependencies {
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'com.github.tomakehurst:wiremock:3.0.1'
     testImplementation 'com.unboundid:unboundid-ldapsdk:7.0.5'
-    testImplementation 'com.icegreen:greenmail:2.1.9'
+    testImplementation 'com.icegreen:greenmail:1.6.15'
 }
 
 jar {