build: bump babelify from 7.3.0 to 8.0.0

[dependabot-preview]

Bumps babelify from 7.3.0 to 8.0.0.

Release notes

Sourced from babelify's releases.

v8.0.0

• Drop Node 0.10/0.12/5 (similar to everything else in Babel 7)
• Add a peerDep on babel-core (similar to how babel-loader works), this is because people end up using incompatible versions of plugins/presets/tools (especially as we make a new major)

https://github.com/babel/grunt-babel/releases/tag/v7.0.0
https://github.com/babel/gulp-babel/releases/tag/v7.0.0

babel/babelify@02f97ec

Commits

• b06b778 8.0.0
• ea73917 Remove path-is-absolute devDep
• 02f97ec drop node 0.10/0.12, add peerDep on babel-core instead of dep, drop object-as...
• 6d45fa8 Explicitly test Node 4, 5 and 6 in travis
• 9944a55 Explain the double negatives a bit better (#197)
• d9e3029 babelify in quotes in example (#198)
• See full diff in compare view

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