Latest dependency updates (OkHttp 3.8, Protobuf 3.3.1, Rome 1.7.3, Tomcat 8.5.15)

Author: jhoeller

build.gradle

@@ -77,12 +77,12 @@ configure(allprojects) { project ->
 	ext.log4jVersion           = '2.8.2'
 	ext.nettyVersion           = "4.1.11.Final"
 	ext.niomultipartVersion    = "1.0.2"
-	ext.okhttp3Version         = "3.7.0"
+	ext.okhttp3Version         = "3.8.0"
 	ext.poiVersion             = "3.16"
-	ext.protobufVersion        = "3.3.0"
+	ext.protobufVersion        = "3.3.1"
 	ext.quartzVersion          = "2.3.0"
 	ext.reactorVersion         = "Bismuth-M1"
-	ext.romeVersion            = "1.7.2"
+	ext.romeVersion            = "1.7.3"
 	ext.rxjavaVersion          = '1.3.0'
 	ext.rxjavaAdapterVersion   = '1.2.1'
 	ext.rxjava2Version         = '2.1.0'
@@ -92,7 +92,7 @@ configure(allprojects) { project ->
 	ext.snakeyamlVersion       = "1.18"
 	ext.testngVersion          = "6.11"
 	ext.tiles3Version          = "3.0.7"
-	ext.tomcatVersion          = "8.5.14"
+	ext.tomcatVersion          = "8.5.15"
 	ext.tyrusVersion           = "1.13.1"
 	ext.undertowVersion        = "1.4.14.Final"
 	ext.websocketVersion       = "1.1"