Node_modules not updating when altering code

**Describe the bug**
I'd like to help out with some of the bugs but i'm having a hard time getting the demo to update when changes to rimble_ui is made.

**To Reproduce**
Steps to reproduce the behavior:
1. `yarn install` in the root, and `yarn install` in the demo directory.
2. Make changes to library. For example: changing `/src/ToastMessage/index.js`
3. `yarn start` in the demo directory

**Expected behavior**
node_modules in the demo directory does not update to reflect the changes made

**Rimble UI Version**

- 0.10.0 (latest)

**Desktop (please complete the following information):**
- OS: Ubuntu 18.04.3
- Browser: chrome
- Version: 77

**Additional context**
I have tried doing `yarn install `, `yarn install --no-lockfile`, and `yarn update` to get it to change but node_modules never updates

Start by reproducing the issue with yarn install in the repository root and demo directory, then yarn start in demo. Inspect how changes to /src/ToastMessage/index.js are consumed by the demo and verify that the demo reflects library changes without relying on repeated install or update commands.

Written by the indexing model from the issue text.