can't upgrade from webpack 3 to 3.12.0 - npm

Question

I'm trying to use a node package which requires a higher version of webpack than I have installed.
My packages.json file is here.
When I try to install:
npm install webpack#3.12.0
I get the following error:
$ npm install webpack#3.12.0
app#1.0.0 /home/ubuntu/workspace
└── UNMET PEER DEPENDENCY webpack#3.12.0
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents#^1.1.2 (node_modules/watchpack/node_modules/chokidar/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents#1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents#^1.0.0 (node_modules/chokidar/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents#1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
npm WARN eonasdan-bootstrap-datetimepicker#4.17.47 requires a peer of bootstrap#^3.3 but none was installed.
npm WARN extract-text-webpack-plugin#2.1.2 requires a peer of webpack#^2.2.0 but none was installed.
npm ERR! code 1

Answer 1

I had the same issue, but it was resolved by following the instructions stated by Vu Huu Cuong:
rm -rf node_modules/
npm cache clean
npm install