Update babelify to version 7.3.0 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

babelify just published its new version 7.3.0, which is not covered by your current version range.

If this pull request passes your tests you can publish your software with the latest version of babelify – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging :palm_tree:

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The new version differs by 26 commits .

• 2728279 7.3.0
• 268d0ad Use "path.join" instead of concating paths
• 6997ff5 Remove "sourceMapRelative" and add "sourceMapsAbsolute"
• 833dfc7 Test assumptions about babel's source maps
• dbe71d1 Test assumptions about browserify's source maps
• c29f70f Update devDependencies
• 5169334 Remove escape from CLI example
• 1b381da 7.2.0
• aadf060 Merge pull request #137 from babel/docs
• 1776228 Update docs (more Babel 6.0)
• 6dc85e1 Add test for "browserify" package.json field
• a5091db Rename "sourceMap" to "sourceMaps"
• d25deab Fix browserify cli subarg arrays
• bb660e5 Merge pull request #135 from bioball/patch-1
• 6e4f4ec Add note about installing presets via npm

There are 26 commits in total. See the full diff.

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