Bump nan from 2.10.0 to 2.12.0

Bumps [nan](https://github.com/nodejs/nan) from 2.10.0 to 2.12.0.
- [Release notes](https://github.com/nodejs/nan/releases)
- [Changelog](https://github.com/nodejs/nan/blob/master/CHANGELOG.md)
- [Commits](nodejs/nan@v2.10.0...v2.12.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

yarn.lock

@@ -190,8 +190,8 @@ ms@2.0.0:
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
 
 nan@^2.10.0:
-  version "2.10.0"
-  resolved "https://registry.yarnpkg.com/nan/-/nan-2.10.0.tgz#96d0cd610ebd58d4b4de9cc0c6828cda99c7548f"
+  version "2.12.0"
+  resolved "https://registry.yarnpkg.com/nan/-/nan-2.12.0.tgz#9d443fdb5e13a20770cc5e602eee59760a685885"
 
 once@^1.3.0:
   version "1.4.0"