Upgrading nyc 11 to 12

Adds istanbul-lib-instrument ^2.1.0, nyc>12.0.2>archy ^1.0.0, nyc>12.0.2>arrify ^1.0.1, nyc>12.0.2>caching-transform ^1.0.0, nyc>12.0.2>convert-source-map ^1.5.1, nyc>12.0.2>debug-log ^1.0.1, nyc>12.0.2>default-require-extensions ^1.0.0, nyc>12.0.2>find-cache-dir ^0.1.1, nyc>12.0.2>find-up ^2.1.0, nyc>12.0.2>foreground-child ^1.5.3, nyc>12.0.2>glob ^7.0.6, nyc>12.0.2>istanbul-lib-coverage ^1.2.0, nyc>12.0.2>istanbul-lib-hook ^1.1.0, nyc>12.0.2>istanbul-lib-report ^1.1.3, nyc>12.0.2>istanbul-lib-source-maps ^1.2.5, nyc>12.0.2>istanbul-reports ^1.4.1, nyc>12.0.2>md5-hex ^1.2.0, nyc>12.0.2>merge-source-map ^1.1.0, nyc>12.0.2>micromatch ^3.1.10, nyc>12.0.2>mkdirp ^0.5.0, nyc>12.0.2>resolve-from ^2.0.0, nyc>12.0.2>rimraf ^2.6.2, nyc>12.0.2>signal-exit ^3.0.1, nyc>12.0.2>spawn-wrap ^1.4.2, nyc>12.0.2>test-exclude ^4.2.0, nyc>12.0.2>yargs 11.1.0, nyc>12.0.2>yargs-parser ^8.0.0.

Drops nyc>11.9.0>archy, nyc>11.9.0>arrify, nyc>11.9.0>caching-transform, nyc>11.9.0>convert-source-map, nyc>11.9.0>debug-log, nyc>11.9.0>default-require-extensions, nyc>11.9.0>find-cache-dir, nyc>11.9.0>find-up, nyc>11.9.0>foreground-child, nyc>11.9.0>glob, nyc>11.9.0>istanbul-lib-coverage, nyc>11.9.0>istanbul-lib-hook, nyc>11.9.0>istanbul-lib-instrument, nyc>11.9.0>istanbul-lib-report, nyc>11.9.0>istanbul-lib-source-maps, nyc>11.9.0>istanbul-reports, nyc>11.9.0>md5-hex, nyc>11.9.0>merge-source-map, nyc>11.9.0>micromatch, nyc>11.9.0>mkdirp, nyc>11.9.0>resolve-from, nyc>11.9.0>rimraf, nyc>11.9.0>signal-exit, nyc>11.9.0>spawn-wrap, nyc>11.9.0>test-exclude, nyc>11.9.0>yargs, nyc>11.9.0>yargs-parser.

Installs 284 packages in all (was 326).