[Snyk] Upgrade ethers from 5.0.26 to 5.4.7

Snyk has created this PR to upgrade ethers from 5.0.26 to 5.4.7.

merge advice :information_source: Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

The recommended version is 22 versions ahead of your current version.
The recommended version was released a month ago, on 2021-09-16.

The recommended version fixes:

Severity	Issue	PriorityScore (*)	Exploit Maturity
	Regular Expression Denial of Service (ReDoS) SNYK-JS-WS-1296835	586/1000 Why? Proof of Concept exploit, Has a fix available, CVSS 5.3	Proof of Concept
	Cryptographic Issues SNYK-JS-ELLIPTIC-1064899	586/1000 Why? Proof of Concept exploit, Has a fix available, CVSS 5.3	No Known Exploit

(*) Note that the real score may have changed since the PR was raised.

Release notes

Package name: ethers

5.4.7 - 2021-09-16

Fix parseUints with excess zeros and fix ReDoS issue. (#2016, #1975, #1976; 32a6b2a)

Embedding UMD with SRI:

<script type="text/javascript"
        integrity="sha384-sZE9Fv4ksabiit2R12RbENLCRop5vpbBt6dZPJwM6l+1L0fAm8Q45psc7tmp7mi/"
        crossorigin="anonymous"
        src="https://cdn-cors.ethers.io/lib/ethers-5.4.7.umd.min.js">
</script>

5.4.6 - 2021-08-27
- Temporarily remove the block miner for clique-based networks from CI testing. (#1967; 8320d53)
- More readable errors involving Uint8Arrays. (b6a061e)
- Added Deferred Error support to Description objects to extent Interface parse methods. (#1894; a662490)
- Fix address coder to prepare non-hexdatastring addresses as hexdatastring. (#1906; 017b1fe)
- Removed temporary code for better errors needed until Alchemy added EIP-1559 support. (#1893; accb852)
Embedding UMD with SRI:
```
<script type="text/javascript"
        integrity="sha384-jaqCQEyTaqkzVimN6ycsv5kLSWUSF2ONLspf9q2ETyrm6vav2RnRxhxik5dPc3zP"
        crossorigin="anonymous"
        src="https://cdn-cors.ethers.io/lib/ethers-5.4.6.umd.min.js">
</script>
```

5.4.5 - 2021-08-18

Fxied getBlockWithTransactions results (1858). (78e4273)

Embedding UMD with SRI:

<script type="text/javascript"
        integrity="sha384-NvZDg6ALAelzcNNdjR3jfJwpEPg50zAPV5PB5BV1zx/+KF48DYHNKeUCllqDNjKj"
        crossorigin="anonymous"
        src="https://cdn-cors.ethers.io/lib/ethers-5.4.5.umd.min.js">
</script>

5.4.4 - 2021-08-05

Fixed Etherscan API key in default provider. (#1807; 1d27d95)
Adjust default masPriorityFeePerGas to account for MEV-heavy blocks. (#1817; 7175e2e)

Embedding UMD with SRI:

<script type="text/javascript"
        integrity="sha384-+zmUPvri3U8M4vN+Wf/Hp9TW5FZAEnEBnyiQ5/nJm/Bm5GjzrLGiDt36mx2uIVmr"
        crossorigin="anonymous"
        src="https://cdn-cors.ethers.io/lib/ethers-5.4.4.umd.min.js">
</script>

5.4.3 - 2021-07-30
- Fixed JsonRpcProvider for pre-EIP-2930 chains. (#1766; 7274cd0)
- Forward some missing EIP-1559 fields to call and estimateGas. (#1766; be3854e)
- Fixed possible UnhandledPromiseException for bad ENS names. (63f8b28)
- Prevent overriding value for non-payble constructors. (#1785; 593b488)
Embedding UMD with SRI:
```
<script type="text/javascript"
        integrity="sha384-vsz9YA+ULlESA0434y8k25Vio7Dzn/cFXLqZT+Dk4qv2IMESrfJqqlIws85A9n2g"
        crossorigin="anonymous"
        src="https://cdn-cors.ethers.io/lib/ethers-5.4.3.umd.min.js">
</script>
```
5.4.2 - 2021-07-23
- Fix test case for new transactions responses. (0aafca7)
- Added matic support to INFURA and Alchemy. (#1546; 576e9b5)
- Added string change to coalesce errors on some clients. (bc5cc2e)
- Added wait to transactions returned by getBlockWithTransactions. (#971; 660e69d)
- Fixed floor, ceiling and round for FixedNumber for non-default Formats. (#1749; 551cfa0)
- Fixed null confirmations in Wallet transaction. (#1706; 0f0d0c0)
- Fixed Etherscan string change and enabled all tests. (a1f8d18)
Embedding UMD with SRI:
```
<script type="text/javascript"
        integrity="sha384-E3C8Sq6evrXkqc76OyCo0CoYAb/wRJnUekj79DC85Soudd4+MuAPY0VzpQYzhY68"
        crossorigin="anonymous"
        src="https://cdn-cors.ethers.io/lib/ethers-5.4.2.umd.min.js">
</script>
```
5.4.1 - 2021-07-03
- Added Pocket back into Homestead defaultProvider and skip certain EtherscanProvider tests affected by outage. (6e8a39e)
- Fixed EtherscanProvider NONCE_EXPIRED matching string update. (ecae793)
- Fixed explicit EIP-1559 keys for JsonRpcSigner. (72feee8)
Embedding UMD with SRI:
```
<script type="text/javascript"
        integrity="sha384-xA6XksA+S81KMKVo5shbejvuHxb0UMBTEG1c2ifc8SsBJKISpURzwy2Y8dDo0fli"
        crossorigin="anonymous"
        src="https://cdn-cors.ethers.io/lib/ethers-5.4.1.umd.min.js">
</script>
```
5.4.0 - 2021-06-26
5.3.1 - 2021-06-11
5.3.0 - 2021-06-01
5.2.0 - 2021-05-20
5.1.4 - 2021-04-26
5.1.3 - 2021-04-20
5.1.2 - 2021-04-19
5.1.1 - 2021-04-18
5.1.0 - 2021-03-30
5.0.32 - 2021-03-08
5.0.31 - 2021-02-13
5.0.30 - 2021-02-09
5.0.29 - 2021-02-03
5.0.28 - 2021-02-03
5.0.27 - 2021-02-01
5.0.26 - 2021-01-14

from ethers GitHub release notes

Commit messages

Package name: ethers

4166b27 Updated dist files.
32a6b2a Fix parseUints with excess zeros and fix ReDoS issue (#2016, #1975, #1976).
f2a32d0 docs: added provider.FeeData
5762a1f updated dist files.
8320d53 Temporarily remove the block miner for clique-based networks from CI testing (#1967).
c41b89a updated dist files.
b6a061e More readable errors involving Uint8Arrays.
a662490 Added Deferred Error support to Description objects to extent Interface parse methods (#1894).
bdb54ac docs: added cookbook entry to compute raw transaction (#1857).
32a90b6 docs: added Alchemy tutorial
95b87f6 docs: added BigNumber.toBigInt (#1799).
017b1fe Fix address coder to prepare non-hexdatastring addresses as hexdatastring (#1906).
accb852 Removed temporary code for better errors needed until Alchemy added EIP-1559 support (#1893).
f0b3bc3 Updated dist files.
78e4273 Fxied getBlockWithTransactions results (1858).
dd09bf0 docs: dded code examples for Contract (#982).
4b163e9 docs: added dynamic localSigner
aacb95c docs: added struct encoding example (#1147, #1301, #1302).
e6315a6 docs: remove need to restart dev node after each run.
3ac91a4 docs: added StaticJsonRpcProvider (#1514, #1531).
2dd5c1a docs: Fixed topicset example (#1538).
2653449 docs: updated transactions for EIP-1559.
cddb038 docs: added API for custom error coding.
e80f8dd docs: updates for EIP-1559 (#1777).

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bosonprotocol / reference-backend

[Snyk] Upgrade ethers from 5.0.26 to 5.4.7 #178

Snyk has created this PR to upgrade ethers from 5.0.26 to 5.4.7.