Merge pull request #339 from afinetooth/deprecation-notice

Add maintenance notice and recommended alternatives

swap exec for execFile in fetchGitData

Bump dot-prop from 4.2.0 to 4.2.1

Bump hosted-git-info from 2.8.8 to 2.8.9

Bump lodash from 4.17.15 to 4.17.21

Bump y18n from 4.0.0 to 4.0.1

Bump ini from 1.3.5 to 1.3.7

Update README.md

xo: make `handle-callback-err` an error.

Regenerate package-lock.json

package.json: reorder properties and add homepage

Update sinon to v.8.x.

tests: fix deprecation warning coming from `sinon.sandbox.create()`

Switch to `xo@0.24.0` for linting