This is a big change that updates some of our build infrastructure
as well as upgrading the bdk dependency. It adds the simple
new_no_persist constructor on the wallet as well as the blocking
esplora client.
This commit resolves a build error related to mismatched JVM target
versions for the Kotlin and Java compile tasks. Previously, the
'compileJava' task was targeting JVM 11, while the 'compileKotlin'
task was targeting JVM 8.
Both tasks have now been set to target JVM 11, ensuring consistency
and eliminating the build error.
