Prepare next development iteration.

Set Spring Boot version to 2.1.18.BUILD-SNAPSHOT.

Set version to 2.1.11.BUILD-SNAPSHOT.

Author: jxblum

gradle.properties

@@ -5,7 +5,7 @@ mockitoVersion=3.5.10
 multithreadedtcVersion=1.01
 pivotalGemFireVersion=9.5.4
 springVersion=5.1.18.RELEASE
-springBootVersion=2.1.17.RELEASE
+springBootVersion=2.1.18.BUILD-SNAPSHOT
 springDataGemFireVersion=2.1.20.RELEASE
 springDataGeodeVersion=2.1.20.RELEASE
 springDataGeodeTestVersion=0.0.8.RELEASE
@@ -14,4 +14,4 @@ springSessionBomVersion=Bean-SR12
 springSessionDataGeodeVersion=2.1.11.RELEASE
 springShellVersion=1.2.0.RELEASE
 testcontainersVersion=1.14.3
-version=1.1.10.RELEASE
+version=1.1.11.BUILD-SNAPSHOT