Update dependency nyc to v12

[renovate]

This Pull Request updates dependency nyc from v11.7.2 to v12.0.2

Release Notes

v12.0.2

Compare Source

Bug Fixes

• don't bundle istanbul-lib-instrument due to Node 6 issues (b4c325b)
• stop bundling istanbul-lib-instrument due to npm issue on Node 6 (#​854) (ddc9331)

---

v12.0.1

Compare Source

Bug Fixes

• don't bundle istanbul-lib-instrument due to Node 6 issues (b4c325b)
• stop bundling istanbul-lib-instrument due to npm issue on Node 6 (#​854) (ddc9331)

---

v12.0.0

Compare Source

Chores

• upgrade to newest version of istanbul codebase (#​848) (19b7d21)

BREAKING CHANGES

• babel@​7 drops Node.js 4 support

---

v11.9.0

Compare Source

Chores

• upgrade to newest version of istanbul codebase (#​848) (19b7d21)

BREAKING CHANGES

• babel@​7 drops Node.js 4 support

---

v11.8.0

Compare Source

Features

• add option that allows instrument to exit on error (#​850) (1329a3b)

---

v11.7.3

Compare Source

Features

• merge together multiple istanbul format reports (#​840) (9def3eb)

11.7.3 (2018-05-10)

11.7.2 (2018-05-08)

11.7.1 (2018-04-17)

---

---

This PR has been generated by Renovate Bot.