chore: release 1.9.0

[github-actions]

🤖 I have created a release *beep* *boop*

1.9.0 (2021-12-26)

Features

• add event test (d5fe4bb)
• added additional functions to IAToken for EIP2612 (df8ee61)
• added event to DelegationAwareAToken (f5fd1b6)
• added indexed to the ICreditDelegation event (0a3d365)
• replaced SafeERC20 with GPv2SafeERC20 (fe4ae41)

Bug Fixes

• Add comment to BorrowLogic (2ae309d)
• add else (4bdbd7f)
• Add explicit access level for variables (8fb2e3c)
• Add mode to FlashLoan event (956c809)
• Add natspec to executeLiquidationCall (9bb5289)
• Add repay with atoken ux issue (b464cf5)
• Avoid finalizeTransfer with 0 value transfer (d6bf261)
• Cache result to not recompute for event (b342d2f)
• Change to in Pool for V2 compatibility (932c5a0)
• Clean cumulateToLiqIndex and add comments (d6e90dc)
• Fix income -> debt in getNormalizedDebt natspec. (9e6b183)
• Fix differences between IPool and Pool (8beefda)
• Fix docstrings (93c2d95)
• Fix docstrings (c55bb04)
• Fix typo (df40063)
• Fix typo in setReserveFreeze function name (da72c39)
• Fix variable name of event in ReserveLogic (40b9bb8)
• Gas optimization UserConfiguration (af00927)
• Handle code style issues (af3743b)
• Improve code readability of ReserveLogic (ae1476d)
• Improve readability of initial values of variables (592b21d)
• Include 100% as valid premiums (c6b3347)
• Make test engine not stop at first failure (84eaf29)
• Move up event in IVariableDebtToken (f536538)
• move up require (d47afa2)
• Re-add getUserCurrentDebtMemory() (7742985)
• Refactor variable calc in StableDebtToken (4ed69b4)
• Remove case, created separate issue (0082fd8)
• remove IAaveIncentivesController casting (9805add)
• Remove redundant casting for block.timestamp (941539f)
• Remove redundant unneeded variable (703782c)
• Remove unneeded delegator param from delegationWithSig typehash (dcf7c36)
• Remove unneeded imports in contracts (48f9e89)
• Remove unneededv variable in cumulateToLiqIndex (75e7fdc)
• removed invalid imports (659b82c)
• rename admin variable (5199283)
• Replace rateMode with interestRateMode and precise dataype (806f161)
• Replace factor with multiplier for clarity (085ad0c)
• Replace HALF_PERCENT with HALF_PERCENTAGE_FACTOR (4fb45ec)
• Replace Helper.toUint128 with OZ SafeCast (3916735)
• Rever simplification of cumulateToLiqIndex due to precision loss (585c9c4)
• set config map to zero on init (ea40ee1)
• Simplify condition in SupplyLogic (6487f29)
• Simplify cumulateToLiqIndex in ReserveLogic (53a95c8)
• swap name (ebd3622)
• Typo in liquidation-emode.spec.ts (97e0acc)
• update admin to internal (7d19d29)
• Update test with new delegationWithSig typehash (fea83f3)
• Use next prefix for isolation mode total debt (5ffeecd)

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[github-actions]

🤖 Release is at https://github.com/aave/aave-v3-core/releases/tag/v1.9.0 🌻