v0.0.103.1

Based on LDK v0.0.103 and LDK-C-Bindings v0.0.103.1, this fixes a number
of minor (and a few major) issues in the Java bindings.

• Exposes the full Logger interface to Java, with information on
  severity and module which originated the log call.
• Expose read on MaybeReadable objects (like Event) which may or
  may not read an object which was written (some Events are not
  written to disk).
• Include documentation from Rust on enum variants.
• Allow specifying a UserConfig object in both
  ChannelManagerConstructor constructors.
• Check array lengths for constant-length arrays (like keys and block
  headers) prior to calling into Rust. This avoids undefined behavior
  (often a crash) when a byte array of incorrect length is passed.
• Provide a new is_ok method on Result types instead of requiring
  matching of the object's type.
• Include missing functions on 3-tuples.
• Resolve a rare use-after-free when returning an object from a Java
  interface method that was called from Rust.
• Increase pointer validity checking in leaktracking builds.
• Resolve a NullPointerException when calling trait methods on a Rust
  instance of a trait which was wrapped in an Option.