feat: bump version

feat: revamp providers (#70)

Co-authored-by: Victor Oliva <[email protected]>
Co-authored-by: Josep M Sobrepere <[email protected]>

feat: update client type to 1.15

Merge pull request #60 from polkadot-api/cs-1.13

feat(ink): add docs for ink attributes (#54)

feat: add offline api docs (#51)

feat(queries): add `watchEntries`

feat(queries): add explanation for opaque keys

feat(signers): add Ecdsa

feat: providers section longer