feat: avoid importing all

Author: samvazquez

src/main/java/org/dataloader/impl/DefaultCacheMap.java

@@ -19,7 +19,9 @@
 import org.dataloader.CacheMap;
 import org.dataloader.annotations.Internal;
 
-import java.util.*;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.concurrent.CompletableFuture;
 
 /**

src/test/java/ReadmeExamples.java

@@ -16,7 +16,11 @@
 import org.dataloader.stats.ThreadLocalStatisticsCollector;
 
 import java.time.Duration;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CompletionStage;
 import java.util.stream.Collectors;