Dependencies don't build under Node 12

[frangio]

Running yarn install at the root of the repo doesn't work if using Node 12, because of compilation errors in dependencies. I haven't checked if installing the CLI as a dependency also causes these errors. We thought this had been fixed in #926.

[spalladino]

Just checked, and installing the CLI as a dependency in a project works fine in node 12.7.0 with npm 6.10.0 in my Ubuntu 19.10. The issue must be in either an example project or a dev dependency.

[abcoathup]

Node: v12.14.1
npm: 6.13.4

npm i @openzeppelin/cli includes following error, but apparently uses JS implementation so still installs Keccak bindings compilation fail. Pure JS implementation will be used.

keccak.target.mk:127: recipe for target 'Release/obj.target/keccak/src/addon.o' failed
make: *** [Release/obj.target/keccak/src/addon.o] Error 1
make: Leaving directory '/c/Users/andre/Documents/projects/forum/twelve/node_modules/solc-wrapper/node_modules/keccak/build'
gyp ERR! build error
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack     at ChildProcess.onExit (/home/abcoathup/.nvm/versions/node/v12.14.1/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:194:23)
gyp ERR! stack     at ChildProcess.emit (events.js:223:5)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:272:12)
gyp ERR! System Linux 4.4.0-18362-Microsoft
gyp ERR! command "/home/abcoathup/.nvm/versions/node/v12.14.1/bin/node" "/home/abcoathup/.nvm/versions/node/v12.14.1/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /c/Users/andre/Documents/projects/forum/twelve/node_modules/solc-wrapper/node_modules/keccak
gyp ERR! node -v v12.14.1
gyp ERR! node-gyp -v v5.0.5
gyp ERR! not ok
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] rebuild: `node-gyp rebuild`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] rebuild script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm WARN Local package.json exists, but node_modules missing, did you mean to install?

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/abcoathup/.npm/_logs/2020-02-06T02_01_51_581Z-debug.log
Keccak bindings compilation fail. Pure JS implementation will be used.