Fix updateCopyrights Gradle task

* Do not modify files which already has an actual year in the Copyright
* Make it to be performed really before any compilation, there change
to `compileKotlin.dependsOn updateCopyrights`

build.gradle

@@ -228,7 +228,7 @@ subprojects { subproject ->
 						def matcher = line =~ /Copyright (20\d\d)-?(20\d\d)?/
 						if (matcher.count) {
 							def beginningYear = matcher[0][1]
-							if (now != beginningYear || now != matcher[0][2]) {
+							if (now != beginningYear && now != matcher[0][2]) {
 								def years = "$beginningYear-$now"
 								def sourceCode = file.text
 								sourceCode = sourceCode.replaceFirst(/20\d\d(-20\d\d)?/, years)
@@ -243,7 +243,7 @@ subprojects { subproject ->
 		}
 	}
 
-	processResources.dependsOn updateCopyrights
+    compileKotlin.dependsOn updateCopyrights
 
 	jacocoTestReport {
 		reports {