test: use void and type (#176)

* test: use void and type

* build: micronaut test to 3.0.5

* build: groovy to 3.0.10

Author: sdelamo

gradle.properties

@@ -4,9 +4,9 @@ projectGroup=io.micronaut.rxjava3
 micronautDocsVersion=2.0.0
 micronautVersion=3.3.0
 
-micronautTestVersion=3.0.2
+micronautTestVersion=3.0.5
 
-groovyVersion=3.0.9
+groovyVersion=3.0.10
 spockVersion=2.0-groovy-3.0
 
 rxJava3Version=3.1.3

rxjava3-http-client/src/test/groovy/io/micronaut/rxjava3/http/client/RxClientCloseSpec.groovy

@@ -4,9 +4,9 @@ import spock.lang.Specification
 import spock.util.concurrent.PollingConditions
 
 class RxClientCloseSpec extends Specification {
-    def "confirm RxHttpClient can be stopped"() {
+    void "confirm RxHttpClient can be stopped"() {
         given:
-        def client = Rx3HttpClient.create(new URL("http://localhost"))
+        Rx3HttpClient client = Rx3HttpClient.create(new URL("http://localhost"))
 
         expect:
         client.isRunning()
@@ -19,15 +19,16 @@ class RxClientCloseSpec extends Specification {
         }
     }
 
-    def "confirm RxHttpClient can be closed"() {
+    void "confirm RxHttpClient can be closed"() {
         given:
-        def client = Rx3HttpClient.create(new URL("http://localhost"))
+        Rx3HttpClient client = Rx3HttpClient.create(new URL("http://localhost"))
 
         expect:
         client.isRunning()
 
         when:
         client.close()
+        
         then:
         new PollingConditions().eventually {
             !client.isRunning()