Trading-strategy

A large impact optimisation update.

- Optimise `PandasPairUniver.get_pair_by_id` to cache full `DEXPair` objects to speed up
strategies using large number of trading pairs

- Make `DEXPair` Python `__slots__` based to make the object property access faster

- Added `ResampledLiquidityUniverse` for faster backtesting with luidity data

- Allow different granularity of OHLCV and liquidity data in `Universe`

- Release failed

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- Add `LiquidityUniverse.get_liquidity_with_tolerance`

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- Quick fix on `get_pair_by_human_description` error message

- Improve `CandleSampleUnavailable` error messge further to offer friendly advises how to fix
- Improve `ExchangeUniverse` interface with more helpful shorthand methods

- Add `ExchangeUniverse.from_collection()`
- Pass `ExchangeUniverse` instance as a part of `Universe.exchange_universe` instead just raw array of
of `univer.exchanges`