Injective-py

* Add web3 library as a dependency for the project.

* Moved the configuration to use a secure or insecure connection inside the Network class. The AsyncClient's `insecure` parameter is no longer used for anything and will be removed in the future.
* Made the new load balanced bare-metal node the default one for mainnet (it is called `lb`). The legacy one (load balanced k8s node) is called `lb_k8s`

* Refactor Composer to be created with all the markets and tokens. The Composer now uses the real markets and tokens to convert human-readable values to chain format
* The Composer can still be instantiated without markets and tokens. When markets and tokens are not provided the Composer loads the required information from the Denoms used in previous versions
* Change in AsyncClient to be able to create Composer instances for the client network, markets and tokens
* Examples have been adapted to create Composer instances using the AsyncClient
* Added new nodes (bare-metal load balancing nodes) for mainnet and testnet
* Deprecated the kubernetes load balanced nodes for testnet
* Refactored the cookies management logic into a cookie assistant. Added the required logic to support the new cookies format for bare-metal load balanced nodes
* Removed class Client. The only supported now is the async version called AsyncClient.

* Synchronization of denoms configuration files.

* Added a new gas limit calculation for the TransactionBroadcaster that estimates the value based on the messages in the transaction (without running the transaction simulation).

* Add NBLA