Tidy up project

[cstamas]

Apply same set of changes as to https://github.com/ipfs-shipyard/java-ipfs-http-client

Changes:

• GH workflow updates (Java 21, use mvnw)
• GH dependabot enabled for Maven as well
• apply same .mvn/maven.config (but no checksum as there are no deps)
• use wrapper + enable sha256 distro checksum
• reformat same way as ipfs-http-client
• update to Junit 6.0.2 (drop hamcrest; is unused)
• no Java source code changes (sans reformat)

Dependency uses SNAPSHOT of multibase (will fail on CI).

[ianopolous]

Thank you!

[cstamas]

So what now (re SNAPSHOT)? We gonna perform tidy-ups and releases in lockstep? Or any other idea?

Before doing that, we may want to lay down names? Are module names mentioned in PR https://github.com/ipfs-shipyard/java-ipfs-http-client/pull/269/changes okay?

[ianopolous]

Lockstep is fine by me. And those module names look fine.

[cstamas]

Right. There is another problem: The v prefix for versions caused errors in JPMS

Caused by: java.lang.IllegalArgumentException: error: bad value for --module-version option: 'v1.3.0-SNAPSHOT'
    at com.sun.tools.javac.main.Arguments.error (Arguments.java:902)
    at com.sun.tools.javac.main.Arguments.doProcessArgs (Arguments.java:384)
    at com.sun.tools.javac.main.Arguments.processArgs (Arguments.java:348)
    at com.sun.tools.javac.main.Arguments.init (Arguments.java:247)
    at com.sun.tools.javac.api.JavacTool.getTask (JavacTool.java:191)
    at com.sun.tools.javac.api.JavacTool.getTask (JavacTool.java:119)
    at com.sun.tools.javac.api.JavacTool.getTask (JavacTool.java:68)
    at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess (JavaxToolsCompiler.java:125)

So I removed those, but that will cause breakage

[cstamas]

Discuss it here multiformats/java-multibase#48

[cstamas]

Just as a demo, pushed more: snapshots are now shared via IPFS. Repository (for demo purposes) is:
https://ipfs.io/ipns/ipfs.maveniverse.eu/repository-ipfs-snapshots

[cstamas]

Ok, changes pushed:

• undone IPFS experiment
• back to original "tidy up"
• using java-multibase 1.3.0 from jitpack.io

[cstamas]

If merging this, please squash merge (or ping me to squash beforehand)