remove java 8 incompatible Map.of

Author: brokkoli71

pom.xml

@@ -30,8 +30,7 @@
     </scm>
 
     <properties>
-        <maven.compiler.source>8</maven.compiler.source>
-        <maven.compiler.target>8</maven.compiler.target>
+        <maven.compiler.release>8</maven.compiler.release>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <jackson.version>2.14.2</jackson.version>
         <aws.version>1.12.477</aws.version>
@@ -136,7 +135,7 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.13.0</version>
                 <configuration>
-                    <release>8</release>
+                    <release>${maven.compiler.release}</release>
                     <encoding>UTF-8</encoding>
                     <excludes>
                         <exclude>.gitignore</exclude>

src/test/java/dev/zarr/zarrjava/ZarrTest.java

@@ -14,7 +14,6 @@
 import dev.zarr.zarrjava.v3.*;
 import dev.zarr.zarrjava.v3.codec.CodecBuilder;
 import dev.zarr.zarrjava.v3.codec.core.TransposeCodec;
-import jdk.jshell.spi.ExecutionControl;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
@@ -30,6 +29,7 @@
 import java.nio.file.Paths;
 import java.util.Arrays;
 import java.util.Comparator;
+import java.util.HashMap;
 import java.util.Map;
 import java.util.stream.Stream;
 
@@ -150,13 +150,16 @@ public void testWriteReadWithZarrita(String codec, String codecParam) throws Exc
         int[] testData = new int[16 * 16 * 16];
         Arrays.setAll(testData, p -> p);
 
+        Map<String, Object> attributes = new HashMap<>();
+        attributes.put("test_key", "test_value");
+
         StoreHandle storeHandle = new FilesystemStore(TESTOUTPUT).resolve("write_to_zarrita", codec, codecParam);
         ArrayMetadataBuilder builder = Array.metadataBuilder()
                 .withShape(16, 16, 16)
                 .withDataType(DataType.UINT32)
                 .withChunkShape(2, 4, 8)
                 .withFillValue(0)
-                .withAttributes(Map.of("test_key", "test_value"));
+                .withAttributes(attributes);
 
         switch (codec) {
             case "blosc":
@@ -425,8 +428,11 @@ public void testV3FillValue() throws ZarrException {
     public void testV3Group() throws IOException, ZarrException {
         FilesystemStore fsStore = new FilesystemStore(TESTOUTPUT);
 
+        Map<String, Object> attributes = new HashMap<>();
+        attributes.put("hello", "world");
+
         Group group = Group.create(fsStore.resolve("testgroup"));
-        Group group2 = group.createGroup("test2", Map.of("hello", "world"));
+        Group group2 = group.createGroup("test2", attributes);
         Array array = group2.createArray("array", b ->
                 b.withShape(10, 10)
                         .withDataType(DataType.UINT8)