Use Paths.get rather than Path.of in Html5libTest

This change replaces Path.of() calls in Html5libTest with Paths.get().

Per https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/nio/file/Path.html#of(java.net.URI)
Path.of() was introduced in Java 11. So Java 8 has no Path.of(); see
also https://docs.oracle.com/javase/8/docs/api/java/nio/file/Path.html

We need to continue to support Java 8 for the time being. It seems
Paths.get() will eventually end up being formally deprecated; by the
time it finally is, we may also be able to quit supporting Java 8 — and
so we can just switch to Path.of() then.

test-src/nu/validator/htmlparser/test/Html5libTest.java

@@ -29,6 +29,7 @@
 import java.nio.file.FileVisitResult;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.nio.file.SimpleFileVisitor;
 import java.nio.file.attribute.BasicFileAttributes;
 import java.util.function.Consumer;
@@ -38,7 +39,7 @@ public class Html5libTest {
     private final Path testDir;
 
     public Html5libTest() throws URISyntaxException {
-        this.testDir = Path.of(
+        this.testDir = Paths.get(
                 Html5libTest.class.getResource("/html5lib-tests").toURI());
     }
 
@@ -111,7 +112,8 @@ private TestVisitor(boolean skipScripted, String requiredTestExtension,
         @Override
         public FileVisitResult preVisitDirectory(Path dir,
                 BasicFileAttributes attrs) throws IOException {
-            if (skipScripted && dir.getFileName().equals(Path.of("scripted"))) {
+            if (skipScripted
+                    && dir.getFileName().equals(Paths.get("scripted"))) {
                 return FileVisitResult.SKIP_SUBTREE;
             }