Update shadow plugin to 7.1.2

^KTI-728 Fixed

kotlin-native/tools/kotlin-native-gradle-plugin/build.gradle

@@ -34,7 +34,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'gradle.plugin.com.github.johnrengelman:shadow:7.1.1'
+        classpath 'gradle.plugin.com.github.johnrengelman:shadow:7.1.2'
         classpath "org.jetbrains.kotlin:kotlin-native-shared:$konanVersion"
     }
 }