Prepare next development iteration.

Set Spring Boot version to 2.5.12-SNAPSHOT.

Set version to 1.5.12-SNAPSHOT.

Author: jxblum

gradle.properties

@@ -8,7 +8,7 @@ multithreadedtcVersion=1.01
 pivotalCloudCacheVersion=1.13.7
 pivotalGemFireVersion=9.10.15
 springVersion=5.3.17
-springBootVersion=2.5.11
+springBootVersion=2.5.12-SNAPSHOT
 springCloudBindingsVersion=1.7.1
 springDataBomVersion=2021.0.10
 springDataGeodeVersion=2.5.10
@@ -17,4 +17,4 @@ springSessionBomVersion=2021.0.5
 springSessionDataGeodeVersion=2.5.6
 springShellVersion=1.2.0.RELEASE
 testcontainersVersion=1.16.3
-version=1.5.11
+version=1.5.12-SNAPSHOT