Fixed mailhog build.gradle

...hopefully ;P

modules/mailhog/build.gradle

@@ -1,11 +1,11 @@
 description = "Testcontainers :: MailHog"
 
 dependencies {
-    compile project(':testcontainers')
-    compile 'org.apache.httpcomponents:httpclient:4.5.8'
-    compile 'org.apache.commons:commons-collections4:4.3'
+    api project(':testcontainers')
+    implementation 'org.apache.httpcomponents:httpclient:4.5.8'
+    implementation 'org.apache.commons:commons-collections4:4.3'
 
-    testCompile 'com.sun.mail:javax.mail:1.6.0'
-    testCompile 'org.apache.httpcomponents:httpcore:4.4.11'
-    testCompile 'org.hamcrest:hamcrest-library:1.3'
+    testImplementation 'com.sun.mail:javax.mail:1.6.0'
+    testImplementation 'org.apache.httpcomponents:httpcore:4.4.11'
+    testImplementation 'org.hamcrest:hamcrest-library:1.3'
 }