fix: table of contents in README

fix: update all packages, tests, and README

fix: bumped cross-spawn to version 7.0.0 (#211)

* bumped cross-spawn to version 7.0.0 and added a warning about node.js 7 and lower

* package.json, engines node : ">=8.0"

BREAKING CHANGE: Drop support for Node.js < 7.

fix: remove is-windows dependency (#207)

feat(deps): upgrade cross-spawn (#182)

fix: check for sigint before setting exit code to 1 (#181)

fix: exit code should be set to 1 when os kills child process (#177)

* fixes #150 exit code when os kills child process

* Update .all-contributorsrc

fix: allow backslash (#173)

* add backslash test

* allow escaped backslash through

fix: regex flag fix (#161)

* Adding myself as a contributor

* Using regex literal instead of constructor function

closes #159
closes #160

fix: handle escaping and single quotes (#158)