Update dependency cross-spawn to v7

This MR contains the following updates:

Package	Type	Update	Change
cross-spawn	devDependencies	major	4.0.2 -> 7.0.3

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Release Notes

moxystudio/node-cross-spawn

v7.0.3

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v7.0.2

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v7.0.1

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v7.0.0

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BREAKING CHANGES

• drop support for Node.js < 8

• drop support for versions below Node.js 8 (#​125) (16feb53)

v6.0.5

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Bug Fixes

• avoid using deprecated Buffer constructor (#​94) (d5770df), closes /nodejs.org/api/deprecations.html#deprecations_dep0005

v6.0.4

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Bug Fixes

• fix paths being incorrectly normalized on unix (06ee3c6), closes #​90

v6.0.3

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6.0.3 (2018-01-23)

v6.0.2

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6.0.2 (2018-01-23)

v6.0.1

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6.0.1 (2018-01-23)

v6.0.0

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Bug Fixes

• fix certain arguments not being correctly escaped or causing batch syntax error (900cf10), closes #​82 #​51
• fix commands as posix relatixe paths not working correctly, e.g.: ./my-command (900cf10)
• fix options argument being mutated (900cf10)
• fix commands resolution when PATH was actually Path (900cf10)

Features

• improve compliance with node's ENOENT errors (900cf10)
• improve detection of node's shell option support (900cf10)

Chores

• upgrade tooling
• upgrate project to es6 (node v4)

BREAKING CHANGES

• remove support for older nodejs versions, only node >= 4 is supported

5.1.0 (2017-02-26)

Bug Fixes

• fix options.shell support for NodeJS v4.8

5.0.1 (2016-11-04)

Bug Fixes

• fix options.shell support for NodeJS v7

v5.1.0

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Bug Fixes

• fix options.shell support for NodeJS v4.8

v5.0.1

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Bug Fixes

• fix options.shell support for NodeJS v7

v5.0.0

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Features

• add support for options.shell
• improve parsing of shebangs by using shebang-command module

Chores

• refactor some code to make it more clear
• update README caveats

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