Update protobufjs to the latest version 🚀

[greenkeeper[bot]]

Version 6.0.2 of protobufjs just got published.

Dependency	protobufjs
Current Version	5.0.1
Type	devDependency

The version 6.0.2 is not covered by your current version range.

Without accepting this pull request your project will work just like it did before. There might be a bunch of new features, fixes and perf improvements that the maintainers worked on for you though.

I recommend you look into these changes and try to get onto the latest version of protobufjs. Given that you have a decent test suite, a passing build is a strong indicator that you can take advantage of these changes by merging the proposed change into your project. Otherwise this branch is a great starting point for you to work on the update.

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Not sure how things should work exactly?

There is a collection of [frequently asked questions](https://greenkeeper.io/faq.html) and of course you may always [ask my humans](https://github.com/greenkeeperio/greenkeeper/issues/new).

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Your Greenkeeper Bot :palm_tree:

[greenkeeper[bot]]

Version 6.1.0 just got published.

Update to this version instead 🚀

Commits

The new version differs by 54 commits .

• 163ff71 6.1.0 [ci skip]
• adf3cc3 Transition to micromodules
• 11d844c Minimal documentation for micromodules
• f3a9589 Refactored argument order of utf8 for plausibility
• 14c207e Restructured reusable micromodules
• b510ba2 Can't use Uint8Array#set on node < 6 buffers
• c3c70fe Fixed failing test case on node < 6
• 66be598 Fixed serialization order of sfixed64, fixes #536
• 67449db Verify empty base64 encoded strings for bytes fields, see #535
• a0398f5 Initial base64 string support for bytes fields, see #535
• 7def340 Fixed serialization order of fixed64, fallback to parseInt with no long lib, see #534
• 47608dd Document all the callbacks, see #527
• 1a8c720 README on tests
• 78952a5 Test case for #531
• 55db92e decodeDelimited always forks if writer is specified, see #531

There are 54 commits in total. See the full diff.