v2.9.1 - Price Oracles

• Use coingecko as price oracle as last resource
• Implement coingecko client instead of using pycoingecko (doesn't handle exceptions well)
• Implement Curve/Balancer/Mooniswap/Uniswap Pool oracles
• Refactor token prices api clients (Kraken/Binance/Kucoin)
• Disable some oracles in other networks different that Mainnet