Upgrade Lettuce, AssertJ versions

Author: garyrussell

build.gradle

@@ -103,7 +103,7 @@ subprojects { subproject ->
 		apacheSshdVersion = '2.3.0'
 		avroVersion = '1.9.0'
 		aspectjVersion = '1.9.4'
-		assertjVersion = '3.12.2'
+		assertjVersion = '3.13.1'
 		assertkVersion = '0.19'
 		awaitilityVersion = '3.1.6'
 		boonVersion = '0.34'
@@ -134,7 +134,7 @@ subprojects { subproject ->
 		junitPlatformVersion = '1.5.1'
 		jythonVersion = '2.7.0'
 		kryoShadedVersion = '4.0.2'
-		lettuceVersion = '5.1.7.RELEASE'
+		lettuceVersion = '5.1.8.RELEASE'
 		log4jVersion = '2.12.0'
 		micrometerVersion = '1.2.0'
 		mockitoVersion = '3.0.0'