npm: v6.9.0 Release

FEATURES

• 2ba3a0f67 #90 Time traveling installs using the --before flag. (@zkat)
• b7b54f2d1 #3 Add support for package aliases. This allows packages to be installed under a different directory than the package name listed in package.json, and adds a new dependency type to allow this to be done for registry dependencies. (@zkat)
• 684bccf06 #146 Always save package-lock.json when using --package-lock-only. (@aeschright)
• b8b8afd40 #139 Make empty-string run-scripts run successfully as a no-op. (@vlasy)
• 8047b19b1 npm.community#3784 Match git semver ranges when flattening the tree. (@larsgw)
• e135c2bb3 npm.community#1725 Re-enable updating local packages. (@larsgw)

BUGFIXES

• cf09fbaed #153 Set modified to undefined in npm view when time is not available. This fixes a bug where npm view would crash on certain third-party registries. (@simonua)
• 774fc26ee #154 Print out tar version in install.sh only when the flag is supported not all the tar implementations support --version flag. This allows the install script to work in OpenBSD, for example. (@agudulin)
• 863baff11 #158 Fix typo in error message for npm stars. (@phihag)
• a805a95ad npm.community#4227 Strip version info from pkg on E404. This improves the error messaging format. (@larsgw)

DOCS

• 5d7633833 #160 Add npm add as alias to npm install in docs. (@ahasall)
• 489c2211c #162 Fix link to RFC #10 in the changelog. (@mansona)
• 433020ead #135 Describe exit codes in npm-audit docs. (@emilis-tm)

DEPENDENCIES

• ee6b6746b zkat/make-fetch-happen#29 [email protected] (@TooTallNate)
• 2ce23baf5 [email protected]: Adds support for package aliases (@zkat)
• baaedbc6e [email protected]: Adds opts.before support (@zkat)
• 57e771a03 #164 [email protected] (@kemitchell)
• 2b78288d4 add core to default inclusion tests in pack (@zkat)
• 9b8b6513f npm.community#5382 [email protected]: Fixes bug where core/ directories were being suddenly excluded. (@zkat)