POM: bump dependcy versions

n5  ->  4.0.0-alpha-1
n5-blosc  ->  2.0.0-alpha-1
n5-zstandard  ->  2.0.0-alpha1

Author: tpietzsch

pom.xml

@@ -136,12 +136,11 @@
 		<!-- NB: Deploy releases to the SciJava Maven repository. -->
 		<releaseProfiles>sign,deploy-to-scijava</releaseProfiles>
 
-		<n5.version>3.4.1</n5.version>
 		<json-simple.version>1.1.1</json-simple.version>
 
-		<n5.version>3.3.2-SNAPSHOT</n5.version>
-		<n5-blosc.version>1.1.2-SNAPSHOT</n5-blosc.version>
-		<n5-zstandard.version>1.0.3-SNAPSHOT</n5-zstandard.version>
+		<n5.version>4.0.0-alpha-1</n5.version>
+		<n5-blosc.version>2.0.0-alpha-1</n5-blosc.version>
+		<n5-zstandard.version>2.0.0-alpha1</n5-zstandard.version>
 
 	</properties>