fix: Update the environment argument type (#1712)

Author: mykola-mokhnach

src/main/java/io/appium/java_client/mac/options/SupportsEnvironmentOption.java

@@ -20,7 +20,7 @@
 import io.appium.java_client.remote.options.CanSetCapability;
 import org.openqa.selenium.Capabilities;
 
-import java.util.List;
+import java.util.Map;
 import java.util.Optional;
 
 public interface SupportsEnvironmentOption<T extends BaseOptions<T>> extends
@@ -33,20 +33,20 @@ public interface SupportsEnvironmentOption<T extends BaseOptions<T>> extends
      * the parent process. This capability is only going to be applied if the application
      * is not running on session startup.
      *
-     * @param arguments E.g. ["--help"].
+     * @param env E.g. ["--help"].
      * @return self instance for chaining.
      */
-    default T setEnvironment(List<String> arguments) {
-        return amend(ENVIRONMENT_OPTION, arguments);
+    default T setEnvironment(Map<String, String> env) {
+        return amend(ENVIRONMENT_OPTION, env);
     }
 
     /**
      * Get the application environment variables mapping.
      *
      * @return Application environment mapping.
      */
-    default Optional<List<String>> getEnvironment() {
+    default Optional<Map<String, String>> getEnvironment() {
         //noinspection unchecked
-        return Optional.ofNullable((List<String>) getCapability(ENVIRONMENT_OPTION));
+        return Optional.ofNullable((Map<String, String>) getCapability(ENVIRONMENT_OPTION));
     }
 }