Cannot install node-sass on node 10

[Maistho]

Short description of the problem:

node-sass is pinned to 4.7, which is not compatible with node v10

What behavior are you expecting?

Steps to reproduce:

1. npm i @ionic/app-scripts
2. It crashes

Which @ionic/app-scripts version are you using?
3.1.0

Other information:

Should be fixable by upgrading node-sass to v4.9.0
sass/node-sass#2345

Some stack traces so people can google this easier:

 [email protected] postinstall /home/maistho/prog/ifiske/node_modules/node-sass
> node scripts/build.js

Building: /usr/bin/node /home/maistho/prog/ifiske/node_modules/node-gyp/bin/node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library=

...

In file included from ../../nan/nan.h:51,
                 from ../src/binding.cpp:1:
/home/maistho/.node-gyp/10.2.0/include/node/node.h:53:10: fatal error: core.h: No such file or directory
 #include "core.h"  // NOLINT(build/include_order)
          ^~~~~~~~
compilation terminated.
make: *** [binding.target.mk:115: Release/obj.target/binding/src/binding.o] Error 1
make: Leaving directory '/home/maistho/prog/ifiske/node_modules/node-sass/build'
gyp ERR! build error 
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack     at ChildProcess.onExit (/home/maistho/prog/ifiske/node_modules/node-gyp/lib/build.js:258:23)
gyp ERR! stack     at ChildProcess.emit (events.js:182:13)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:237:12)
gyp ERR! System Linux 4.16.8-1-ARCH
gyp ERR! command "/usr/bin/node" "/home/maistho/prog/ifiske/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd /home/maistho/prog/ifiske/node_modules/node-sass

[Maistho]

This issue is fixed by merging PR #1435

[Asone]

PR #1435 is still awaiting merge approval. ping @dwieeb ?

[imhoffd]

Fixed by #1435

thanks for the ping @Asone

[imhoffd]

fixed in 3.1.10, which was just released