Merge bitcoindevkit/bdk#1263: Bump bdk_esplora and bdk_file_store versions for 1...

8f6dad76efaa4af0ebb990ed83632f230fd10d94 Bump bdk_esplora and bdk_file_store versions for 1.0.0-alpha.3 release (Steve Myers)

Pull request description:

  ### Description

  These crates need to have their versions bumped because the version of bdk_chain was bumped to 0.7.0 with the 1.0.0-alpha.3 release.

  bdk_esplora to 0.5.0
  bdk_file_store to 0.3.0

  After this PR is merged I'll publish new versions of these crates to crates.io.

  ### Notes to the reviewers

  I should have done this as part of the 1.0.0-alpha.3 release process.  This problem was found when @thunderbiscuit started updating the bdk-ffi project to alpha.3 and we got type mismatch errors for bdk_chain types used in bdk_esplora.

ACKs for top commit:
  thunderbiscuit:
    ACK 8f6dad76efaa4af0ebb990ed83632f230fd10d94.

Tree-SHA512: 735094a5d78da082437118a38db085b12c26665c8cf8fd809d62dbe9a058ee04c59a165e454b3eb8baea4209330083a6a7bce8c303be1660f6593c80ccbe46b7