Release v0.6.0

Added

• Add tests for BeginSponsoringFutureReservesOperation
• Add ChangeTrustAsset
• Add ClawbackOperation
• Add ClawbackClaimableBalanceOperation
• Add LiquidityPoolDepositOperation
• Add LiquidityPoolWithdrawOperation
• Add LiquidityPool to the LedgerKey enum
• Add SetTrustlineFlagsOperation
• Add support for revoking liquidity pool sponsorship to RevokeSponsorshipOperation
• Add AUTH_CLAWBACK_ENABLED to AccountFlags
• Add TRUSTLINE_CLAWBACK_ENABLED to TrustLineFlags
• Add TrustlineAsset
• Add InvalidLiquidityPoolIdLength to Error
• Add LedgerKey::LiquidityPool
• Add LiquidityPoolId
• Add LiquidityPoolConstantFeeParameters
• Add LiquidityPoolConstantFee
• Add LiquidityPool
• Add InnerOperationResult::ClaimClaimableBalance
• Add InnerOperationResult::Clawback
• Add InnerOperationResult::ClawbackClaimableBalance
• Add InnerOperationResult::SetTrustLineFlags
• Add InnerOperationResult::LiquidityPoolDeposit
• Add InnerOperationResult::LiquidityPoolWithdraw
• Add InnerTransactionResult::FeeBumpInnerSuccess
• Add InnerTransactionResult::FeeBumpInnerFailed

Changed

• BREAKING: Use ChangeTrustAsset for ChangeTrust operation
• BREAKING: Use TrustLineAsset instead of Asset in LedgerKey::Trustline
• BREAKING: Update xdr_generated.rs from the current stellar X files.
• BREAKING: Use traits from the ed25519 crate to allow using any ed25519
  backend (libsodium, dalek, etc or even a custom signing implementation). The
  use of sodiumoxide is now behind the feature sodium_oxide, which is enabled
  by default.
• Update dependency's versions

Fixed

• Fix ChangeTrustOperationBuilder to allow explicitly passing limit 0.