CLDR-17284 v44.1 cldr-json: fix version number

- _cldrVersion was, recently, only having the major version (44 not 44.1)
- validate semver of the package version
- print a warning if the 'patch' version  is nonzero (#.#.0)

tools/cldr-code/src/main/java/org/unicode/cldr/json/Ldml2JsonConverter.java

@@ -15,6 +15,8 @@
 import com.ibm.icu.text.MessageFormat;
 import com.ibm.icu.util.NoUnit;
 import com.ibm.icu.util.ULocale;
+import com.vdurmont.semver4j.Semver;
+import com.vdurmont.semver4j.Semver.SemverType;
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.IOException;
@@ -405,7 +407,20 @@ public Ldml2JsonConverter(
         this.coverageValue = Level.get(coverage).getLevel();
         this.pkgVersion = pkgVersion;
 
-        LdmlConvertRules.addVersionHandler(pkgVersion.split("\\.")[0]);
+        System.out.println("pkgVersion: " + pkgVersion);
+        final Semver ver = new Semver(pkgVersion, SemverType.STRICT);
+
+        if (ver.getPatch() != 0) {
+            System.err.println(
+                    WARN_ICON + " WARNING: ignoring non-zero patch version in " + pkgVersion);
+        }
+
+        if (ver.getMinor() == 0) {
+            LdmlConvertRules.addVersionHandler(ver.getMajor().toString());
+        } else {
+            LdmlConvertRules.addVersionHandler(
+                    ver.getMajor().toString() + "." + ver.getMinor().toString());
+        }
 
         configFileReader = new LdmlConfigFileReader();
         configFileReader.read(configFile, type);