Release v0.1.0-alpha

Release of 0.1.0-alpha (#1)

* Refactor build.rs

* update build.rs

* Some structure refactor

* Update ethers.rs version, where this bug is fixed (#2)

* Added base utxo connector implementations (#1)

Co-authored-by: Velnbur <[email protected]>

* Small refactor + fix clippy errors

* Return none in `get_utxo_by_id` if utxo wasn't found (#4)

* Add types with fields (#5)

* Yes (#6)

* Add types with fields

* Make contracts compilable to wasm

* Add method for listing utxos by address (#7)

* Add required method to contract

* Small refactor

* Add new contracutors (#8)

* Update contracts (#9)

* Update contract version

* Return error if contracts failed to compile during build

* Update error handling

* Add`Send` bound for non `wasm32` targets (#10)

* Add feature for removing `Send` bound for wasm

* Remove feature and add it as target

* Fix IUTXO connector

* Add bindigs for ERC20 (#11)

* Init

* Update unnecessory abstractions around generated ERC20 cotnract

* Update ethers version (#12)

* Delete actions as there no solc compiler installed

* Set tag in contracts sumbodule

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Co-authored-by: Levochko Anton <[email protected]>