Emanuel Gonçalves

Update Gatsby and other dependencies

2

[Gatsby's changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby/CHANGELOG.md) to reference. Before the PR, you need to check if all is working.

For Sapper, it needs to read the [Migration Guide](https://sapper.svelte.dev/migrating/#0_27_to_0_28) to upgrade to last version of Sapper. Changelogs: * [Svelte](https://github.com/sveltejs/svelte/blob/master/CHANGELOG.md) * [Sapper](https://github.com/sveltejs/sapper/blob/master/CHANGELOG.md) Before the PR, you need to check it all...

**Is your feature request related to a problem? Please describe.** ... **Describe the solution you'd like** - Create a new website logo with correct contrasts

**Is your feature request related to a problem? Please describe.** ... **Describe the solution you'd like** - Create a component that changes by using CSS global variables the collors in...

**Is your feature request related to a problem? Please describe.** In ['Quais as tecnologias para acessibilidade?'](https://acessibilidade-for-devs.github.io/#quais-as-tecnologias-para-acessibilidade) will be more interesting add images for each technology. **Describe the solution you'd like**...

É necessário inserir uma barra de acessibilidade ao site, tendo em vista que ele é um site de referência e não pode faltar isso. Tal barra deve ser parecida com...