Update ethereumjs-tx in group backend to the latest version 🚀

[greenkeeper[bot]]

The devDependency ethereumjs-tx was updated from 1.3.7 to 2.0.0.

This version is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

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Your Greenkeeper bot :palm_tree:

[greenkeeper[bot]]

• The devDependency ethereumjs-tx was updated from 1.3.7 to 2.1.0.

Update to this version instead 🚀

Commits

The new version differs by 9 commits.

• 9a6324f Merge pull request #168 from ethereumjs/new-release-2.1.0
• c33ff1f Add pacakge-lock.json to .gitignore
• 1f61d33 Remove package-lock.json
• 4eb1c36 Update CHANGELOG
• 0eb391b Regenerate docs
• 35a38ca Prepare v2.1.0
• 343ea82 Merge pull request #166 from ethereumjs/custom-network-doc
• 4f3d366 Add examples and doc on how to customize the chain and hardfork
• c987e8e Upgrade ethereumjs-common

See the full diff

[greenkeeper[bot]]

• The devDependency ethereumjs-tx was updated from 1.3.7 to 2.1.1.

Update to this version instead 🚀

[greenkeeper[bot]]

• The devDependency ethereumjs-tx was updated from 1.3.7 to 2.1.2.

Update to this version instead 🚀