medium article: many links are now invalid

[AmirNaghibi]

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Some of the links in the Medium Article about inertia project returns 404

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relevant documentation.

Here is the list of broken lins:

• "Travis is set up to run all of our unit and integration tests on each of the mock remotes"
• All the links under 🤺 User Interfaces section

[bobheadxi]

Unfortunately, the article is quite old, and Inertia as a project has changed quite a lot since it was published 😢 I'll try to make some updates to the article to add notes about things that no longer exist or have moved. Thanks for pointing this out!