Update dependency nyc to v15

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
nyc	devDependencies	major	14.1.1 -> 15.0.0

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Release Notes

istanbuljs/nyc

v15.0.0

Compare Source

⚠ BREAKING CHANGES

• The flow and jsx parser plugins are no longer
  enabled by default.
• Node.js 8 is now required to run nyc
• Remove NYC_ROOT_ID and NYC_INSTRUMENTER environmental
  variables.
• The root field has been removed from processinfo
  files.

Features

• Add --use-spawn-wrap=true option (#​1169) (df4de4d)
• Add .cjs, .mjs, .ts, .tsx, .jsx to default extensions (#​1110) (914b776), closes #​1103
• Allow nyc instrument to instrument code in place (#​1149) (7783284)
• Drop node.js 6, upgrade dependencies (#​1134) (00c3b34)
• Filenames relative to project cwd in coverage reports (#​1212) (5258e9f)
• Use @​istanbuljs/schema for yargs setup (#​1194) (fd40d49)
• Use istanbul-lib-processinfo (#​1145) (7943413)
• Use source base name to prefix cache files (#​1144) (5c1b7a9)

Bug Fixes

• Avoid source-map module during signal-exit handler (#​1191) (83eb629)
• Better error handling for main execution, reporting (#​1229) (dfd629d)
• Correct handling of source-maps for pre-instrumented files (#​1216) (8411a26), closes #​1208
• Drop coverage produced by nyc --all for files that were tested (#​1155) (fc1bbbf), closes #​1113 #​1124 #​1148
• Honor eager setting (false by default) (#​1179) (c18fb0a)
• Remove vestigial environment variables (#​1078) (cfd3da0)

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[codelingo]

LGTM

[renovate]

Renovate Ignore Notification

As this PR has been closed unmerged, Renovate will ignore this upgrade and you will not receive PRs for any future 15.x releases. However, if you upgrade to 15.x manually then Renovate will then reenable updates for minor and patch updates automatically.

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