Develop to Master PR

Lower per tx fee overhead

Lower the constant overhead that is charged per transaction
by about half. This will reduce transaction fees. Note that
this value is in both `l2geth` and in `core-utils` if it
needs to be updated in the future.

batch-submitter: eip1559 logging

Extended test coverage of core-utils

Log values related to eip1559 before sending a transaction.
- `maxFeePerGas`
- `maxPriorityFeePerGas`

Also log the `gasLimit` in case transactions revert.

Use flags for coverage at the package level

Add etherscan verification support

Merge pull request #1399 from ethereum-optimism/dependabot/npm_and_yarn/openzeppelin/contracts-3.4.2

chore(deps-dev): bump @openzeppelin/contracts from 3.4.1 to 3.4.2

Merge pull request #1400 from ethereum-optimism/dependabot/npm_and_yarn/openzeppelin/contracts-upgradeable-3.4.2

chore(deps-dev): bump @openzeppelin/contracts-upgradeable from 3.4.1 to 3.4.2

Develop -> Master Release PR

Version Packages

Develop -> Master PR

l2geth: configurable min L2 gas limit

This commit adds a new config flag `--rollup.minl2gaslimit` that
defaults to `0` and is used to prevent transactions from being ingested
that have a L2 gas limit smaller than the value configured. This
config flag can also be controlled with the env var
`ROLLUP_MIN_L2_GAS_LIMIT`.

Watcher: Even lower num blocks to fetch

Bumps [@openzeppelin/contracts-upgradeable](https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable) from 3.4.1 to 3.4.2.
- [Release notes](https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/releases)
- [Changelog](https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/blob/master/CHANGELOG.md)
- [Commits](https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/commits/v3.4.2)

---
updated-dependencies:
- dependency-name: "@openzeppelin/contracts-upgradeable"
  dependency-type: direct:development
...
Signed-off-by: dependabot[bot] <support@github.com>

Bumps [@openzeppelin/contracts](https://github.com/OpenZeppelin/openzeppelin-contracts) from 3.4.1 to 3.4.2.
- [Release notes](https://github.com/OpenZeppelin/openzeppelin-contracts/releases)
- [Changelog](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/CHANGELOG.md)
- [Commits](https://github.com/OpenZeppelin/openzeppelin-contracts/commits/v3.4.2)

---
updated-dependencies:
- dependency-name: "@openzeppelin/contracts"
  dependency-type: direct:development
...
Signed-off-by: dependabot[bot] <support@github.com>

Develop -> Master Release PR

Version Packages

Develop To Master PR

Watcher: Make blocks to fetch a config option

Lower NUM_BLOCKS_TO_FETCH in Watcher

Develop -> Master Release PR

Version Packages

Merge Develop into Master