Update commander to the latest version 🚀

[greenkeeper]

Version 2.10.0 of commander just got published.

Dependency	commander
Current Version	2.9.0
Type	dependency

The version 2.10.0 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 commander.
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.

---

Release Notes

Release V2.10.0

• Update .travis.yml. drop support for older node.js versions.
• Fix require arguments in README.md
• On SemVer you do not start from 0.0.1
• Add missing semi colon in readme
• Add save param to npm install
• node v6 travis test
• Update Readme_zh-CN.md
• Allow literal '--' to be passed-through as an argument
• Test subcommand alias help
• link build badge to master branch
• Support the alias of Git style sub-command
• added keyword commander for better search result on npm
• Fix Sub-Subcommands
• test node.js stable
• Fixes TypeError when a command has an option called --description
• Update README.md to make it beginner friendly and elaborate on the difference between angled and square brackets.
• Add chinese Readme file

Commits

The new version differs by 50 commits.

• 8870675 version bump 2.10.0
• 98e66bc #330 make .option defaultValue and fn and .version flag optional
• d674384 Merge pull request #639 from abetomo/update_version_to_be_tested
• 45ce032 Remove io.js
• b888282 Add version 5
• 5ac0439 Do not test older versions
• 579f670 Do not test older versions
• 4c7c1cf Add new version
• 8049258 Do not test older versions
• 9bfc4eb Merge pull request #610 from xcatliu/patch-1
• 648629f Merge pull request #619 from Nepomuceno/patch-1
• 20493bb On SemVer you do not start from 0.0.1
• 8a4f1ad Fix require arguments in README.md
• 3367806 Merge pull request #585 from simeg/simeg-patch-1
• ff501a1 Merge pull request #593 from junajan/patch-1

There are 50 commits in total.

See the full diff

Not sure how things should work exactly?

There is a collection of frequently asked questions and of course you may always ask my humans.

---

Your Greenkeeper Bot 🌴

[codecov]

Codecov Report

Merging #3948 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3948      +/-   ##
==========================================
- Coverage   90.56%   90.55%   -0.02%     
==========================================
  Files         115      115              
  Lines        7783     7783              
==========================================
- Hits         7049     7048       -1     
- Misses        734      735       +1

Impacted Files	Coverage Δ
src/RestWrite.js	93.29% <0%> (-0.2%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b6298fe...de9053d. Read the comment docs.