update 3rd party libs and gradle

build.gradle

@@ -30,7 +30,7 @@ ext {
     lib_log4j2_core = 'org.apache.logging.log4j:log4j-core:2.11.2'
     lib_log4j2_slf4j_impl = 'org.apache.logging.log4j:log4j-slf4j-impl:2.11.2'
     
-    lib_primitive_collections='org.lucares:primitiveCollections:0.1.20190217091430'
+    lib_primitive_collections='org.lucares:primitiveCollections:0.1.20190428124907'
     
     lib_spring_boot_log4j2='org.springframework.boot:spring-boot-starter-log4j2:2.1.4.RELEASE'
     lib_spring_boot_mustache='org.springframework.boot:spring-boot-starter-mustache:2.1.4.RELEASE'
@@ -58,7 +58,7 @@ subprojects {
 	apply plugin: 'eclipse'
 
 	// java compatibility version
-	sourceCompatibility = 11
+	sourceCompatibility = 12
 	
 	configurations {
 		tests
@@ -118,5 +118,5 @@ allprojects {
 }
 
 wrapper {
-    gradleVersion = '5.4'
+    gradleVersion = '5.4.1'
 }