Update dependency ethers to v5

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ethers	dependencies	major	4.0.45 -> 5.0.9

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Release Notes

ethers-io/ethers.js

v5.0.9

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• Updated docs for all packages on npm pages. (#​1013; cb8f4a3)
  • Added JSON support to BigNumber. (#​1010; 8facc1a)
  • Updated packages for security audit. (5b5904e)
  • Fix emitted error for ABI code array count mismatch. (#​1004; b0c082d)

v5.0.8

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• Abstract fetchJson for data. (e2d6f28, 2c49a52, e1bbb06)

v5.0.7

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• Fix Logger setLogLevel with enum case mismatch. (#​947; 5443363, af10705)
  • Removed UUID dependency from json-wallets. (#​966; e3f7426)
  • Removed unnecessary dependency from BigNumber. (#​951; 78b350b)

v5.0.6

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• Removed unnecessary dependency from BigNumber. (#​951; 78b350b)
  • Longer Etherscan throttle slot interval. (9f20258)
  • Fixed ENS overrides for the default provider. (#​959; 63dd3d4)
  • Added Retry-After support and adjustable slot interval to fetchJson. (7d43545)
  • Added initial throttling support. (#​139, #​904, #​926; 88c7eae)
  • Use status code 1000 on WebSocket hangup for compatibility. (588f64c)
  • Updated WebSocketProvider to use web-style event listener API. (57fd6f0)
  • Normalize formatUnits to simplified decimals. (79b1da1)
  • Prevent zero-padding on Solidity type lengths. (e128bfc)
  • Set sensible defaults for INFURA and AlchemyAPI getWebSocketProvider methods. (e3d3e60)
  • Added logger assert methods. (619a888)
  • Added initial code coverage testing. (0c1d55b)
  • Added destroy to WebSocketProvider. (d0a79c6)
  • Updated packages (security updates). (c660176)

v5.0.5

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• Fixed splitSignature when recoveryParam is encoded directly. (#​893, #​933; bf65ddb)
  • Fixed BigNumber string validation. (#​935; 7e56f3d)

v5.0.4

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• Prevent negative exponents in BigNumber. (#​925; 84e253f)
  • Fixed StaticJsonRpcProvider when auto-detecting network. (#​901; 0fd9aa5)
  • Added WebSocket static method to Alchemy provider and updated Alchemy URLs. (4838874)

v5.0.3

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• Fixed typo in error string. (7fe702d)
  • Updated elliptic package to address possible malleability issue; which should not affect Ethereum. (9e14345)
  • Fixed FixedNumber unguarded constructor and added isZero. (#​898; 08c74e9)
  • Added StaticJsonRpcProvider for reducing calls to chainId in certain cases. (#​901; c53864d)
  • Allow getDefaultProvider to accept a URL as a network. (8c1ff4c)
  • Make network an optional parameter to WebSocketProvider. (987b535)
  • Removed deprecated errors package. (f9e9347)
  • Updated badges in docs. (d00362e)
  • Create security policy. Create security policy. (88e6849)

v5.0.2

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• Allow provider.ready to stall until the network is available. (#​882; bbb4f40)
  • Reduce dependencies to squash security issues. (738d349)
  • Updated admin scripts for publishing prod releases. (e0e0dbe)

v5.0.1

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• Fixed embedded package version strings. (5a69e9c)

v5.0.0

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• Preserve config canary string. (7157816)
  • Updated docs. (9e4c7e6)

v4.0.48

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v4.0.47

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• Fixed typo in error message. (#​778; fab14f8).
• Allow receive type in ABI without warning. (#​746; e8c89d7).

v4.0.46

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