Update dependency nyc to v15.1.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
nyc (source)	devDependencies	minor	15.0.1 -> 15.1.0

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Release Notes

istanbuljs/nyc

### [`v15.1.0`](https://togithub.com/istanbuljs/nyc/blob/master/CHANGELOG.md#​1510-httpsgithubcomistanbuljsnyccomparev1501v1510-2020-06-01) [Compare Source](https://togithub.com/istanbuljs/nyc/compare/v15.0.1...v15.1.0) ##### Features - **experimental:** Support using `--all` with node.js ESM ([#​1320](https://togithub.com/istanbuljs/nyc/issues/1320)) ([992359a](https://togithub.com/istanbuljs/nyc/commit/992359a1e2108906e28324058008f28aa1052dc1))

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Renovate configuration

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[codecov-commenter]

Codecov Report

Merging #57 into master will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##            master       #57   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           10        10           
  Lines          299       299           
=========================================
  Hits           299       299           

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[coveralls]

Coverage remained the same at 100.0% when pulling 045a3865f90de5c5ec1f06faa2c885f9d7b438c3 on renovate/nyc-15.x into 46c48f75fff3a4d014d959dfd0a55d814a706099 on master.