Error: Cannot find module 'rollup/bin/rollup'

[andrericardo]

Trying to build the project, got an error after running gulp build, what am I doing wrong?

Steps to reproduce
> git clone https://github.com/chartjs/chartjs-chart-financial/
> cd chartjs-chart-financial
> npm install
> gulp build

Confirmed there were no missing dependencies

➜ chartjs-chart-financial git:(master) npm install
audited 7632 packages in 6.617s
found 0 vulnerabilities

➜ chartjs-chart-financial git:(master) gulp build
[00:11:53] Using gulpfile ~/VirtualBox/Win10/chartjs-chart-financial/gulpfile.js
[00:11:53] Starting 'build'...
[00:11:53] Starting 'rollupTask'...
[00:11:53] 'rollupTask' errored after 6.31 ms
[00:11:53] Error: Cannot find module 'rollup/bin/rollup'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:613:15)
at Function.resolve (internal/modules/cjs/helpers.js:28:19)
at run (/Users/andre/VirtualBox/Win10/chartjs-chart-financial/gulpfile.js:42:21)
at rollupTask (/Users/andre/VirtualBox/Win10/chartjs-chart-financial/gulpfile.js:51:3)
at bound (domain.js:400:14)
at runBound (domain.js:413:12)
at asyncRunner (/Users/andre/VirtualBox/Win10/chartjs-chart-financial/node_modules/async-done/index.js:55:18)
at processTicksAndRejections (internal/process/next_tick.js:74:9)
[00:11:53] 'build' errored after 11 ms

> node --version
v11.10.0
> npm --version
6.7.0
> gulp --version
CLI version: 2.2.0
Local version: 4.0.2

[benmccann]

Thanks for the fix