LWC_Test feature/LWC_components ~/projects/LWC_Test $ npm install @salesforce/lwc-jest --save-dev
npm WARN deprecated browserslist@1.7.7: Browserslist 2 could fail on reading Browserslist >3.0 config used in other tools.
npm WARN deprecated kleur@2.0.2: Please upgrade to kleur@3 or migrate to 'ansi-colors' if you prefer the old syntax. Visit <https://github.com/lukeed/kleur/releases/tag/v3.0.0\> for migration path(s).

> deasync@0.1.12 install /Users/<me>/projects/LWC_Test/node_modules/@lwc/jest-transformer/node_modules/deasync
> node ./build.js

CXX(target) Release/obj.target/deasync/src/deasync.o
make: /usr/local/bin/g++-4.2: No such file or directory
make: *** [Release/obj.target/deasync/src/deasync.o] Error 1
gyp ERR! build error
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack at ChildProcess.onExit (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:262:23)
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 Darwin 18.2.0
gyp ERR! command "/usr/local/Cellar/node/10.7.0/bin/node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/<me>/projects/LWC_Test/node_modules/@lwc/jest-transformer/node_modules/deasync
gyp ERR! node -v v10.7.0
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok
Build failed
npm WARN @lwc/jest-transformer@0.33.28-5 requires a peer of @lwc/compiler@0.33.x but none is installed. You must install peer dependencies yourself.
npm WARN @lwc/jest-transformer@0.33.28-5 requires a peer of @lwc/engine@0.33.x but none is installed. You must install peer dependencies yourself.
npm WARN test@ No repository field.
npm WARN test@ No license field.

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! deasync@0.1.12 install: `node ./build.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the deasync@0.1.12 install script.