[added] coverage for getMerkleTreeProof

batch-submitter: remove call to `appendQueueBatch`

docs: point to new specs repository

Watcher: l1 vs l2 blocksToFetch

Adds new config options to the watcher to allow it to upgrade in
a non breaking way. New config options include setting a global
`pollForPending` and `blocksToFetch`. It is also possible to
specify the number of blocks to fetch on each `Layer`.

The event ids are precomputed and held as globals instead of computed
on the fly each time.

chore(deps): bump mixme from 0.5.1 to 0.5.2

Bumps [mixme](https://github.com/adaltas/node-mixme) from 0.5.1 to 0.5.2.
- [Release notes](https://github.com/adaltas/node-mixme/releases)
- [Changelog](https://github.com/adaltas/node-mixme/blob/master/CHANGELOG.md)
- [Commits](https://github.com/adaltas/node-mixme/compare/v0.5.1...v0.5.2)

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updated-dependencies:
- dependency-name: mixme
  dependency-type: indirect
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Develop -> Master PR

l2geth: config enable arbitrary contract deployment

Update labeler.yml

Add a new config option `ROLLUP_ENABLE_ARBITRARY_CONTRACT_DEPLOYMENT`.
This config option must be set with an env var, there is no flag to
set it with.

If it is not set, the functionality is unchanged. If it is set, then it
will override the function `isDeployerAllowed(address)` on the
`OVM_DeployerWhitelist`

ci: fix workflow for exporting logs

The logs after failure are not being exported correctly as they are not
being written to the correct location. Previously `~` was not being
interpreted as `$HOME`. This assumes that the `cwd` is `$HOME`.

Develop -> Master Release PR

Version Packages

Develop -> Master PR

fix: use the same nonce for each batch submission

chore(deps): bump axios from 0.21.1 to 0.21.2

Develop -> Master Release PR

Bumps [axios](https://github.com/axios/axios) from 0.21.1 to 0.21.2.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/master/CHANGELOG.md)
- [Commits](https://github.com/axios/axios/compare/v0.21.1...v0.21.2)

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- dependency-name: axios
  dependency-type: direct:production
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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