Switch from .transfer to solmate's safeTransferETH

[haydenshively]

Could theoretically make the protocol more resilient to Ethereum upgrades, if such upgrades increase the gas cost of ether transfers.

On the other hand, allows reentrancy. But CEI should keep us safe.

Addresses:

• OxZ00mer - The functionality of payable(address).transfer will be compromised if the cost of SLOAD increases sherlock-audit/2023-10-aloe-judging#123
• Jaraxxus - address.call{value:x}() should be used instead of payable.transfer() sherlock-audit/2023-10-aloe-judging#105
• 0xmuxyz - Due to a gas limit (2300 gas) of the transfer() function of Native ETH, the transaction of the payable(callee).transfer(address(this).balance / strain) in the Borrower#liquidate() may be reverted sherlock-audit/2023-10-aloe-judging#92
• kaysoft - Use of address.transfer(...) native function can revert. sherlock-audit/2023-10-aloe-judging#87
• Bauer - Use call() instead of transfer() on an address payable sherlock-audit/2023-10-aloe-judging#12
• 0xweb3boy - Withdrawing ante can fail due to use of transfer() on address payable sherlock-audit/2023-10-aloe-judging#18
• rvierdiiev - Borrower.liquidate can revert if liqudators need more than 2300 gas to hadle payment sherlock-audit/2023-10-aloe-judging#62
• 0xfave - Borrower.sol#withdrawAnte - transfer()` depends on gas constants sherlock-audit/2023-10-aloe-judging#53
• Oxhunter526 - Zero transaction Status Verification After Fund Transfer sherlock-audit/2023-10-aloe-judging#54

[github-actions]

Changes to gas cost

Generated at commit: a9f86609411d8cb7befabdadd3f181da1a6ce92a, compared to commit: 8a608f07f9214c7094d63d7a37b13b1c9bdaf89d

🧾 Summary (10% most significant diffs)

Contract	Method	Avg (+/-)	%
BorrowerDeployer	deploy	+31,880 ❌	+0.97%

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Full diff report 👇

Contract	Deployment Cost (+/-)	Method	Min (+/-)	%	Avg (+/-)	%	Median (+/-)	%	Max (+/-)	%	# Calls (+/-)
BorrowerDeployer	3,547,389 (+31,841)	deploy	3,317,437 (+31,880)	+0.97%	3,317,853 (+31,880)	+0.97%	3,317,437 (+31,880)	+0.97%	3,319,937 (+31,880)	+0.97%	18 (0)
Borrower	3,283,607 (+31,840)	liquidate	0 (0)	+∞%	53,573 (-23)	-0.04%	50,074 (-35)	-0.07%	127,953 (-6)	-0.00%	6 (0)