Release v3.1.0

java-sdk-demo 3.1.0

• adapt Java sdk v3.1.0

What's Changed

• (Test): Add delegateCall performance test by @JimmyShi22 in #138
• (perf): fix performanceTable createTable negative number bug. by @kyonRay in #139
• Update dmc smallbank perf program by @morebtcg in #140

Full Changelog: v3.0.1...v3.1.0