fix: 💫 updated packages

update gatsby from 3.6.2 to 3.7.1
update gatsby-plugin-gatsby-cloud from 2.6.1 to 2.7.1
update gatsby-plugin-image from 1.6.0 to 1.7.1
update gatsby-plugin-mdx from 2.6.0 to 2.7.1
update gatsby-plugin-react-helmet from 4.6.0 to 4.7.1
update gatsby-plugin-sass from 4.6.0 to 4.7.1
update gatsby-plugin-sharp from 3.6.0 to 3.7.1
update gatsby-remark-images from 5.3.0 to 5.4.1
update gatsby-source-filesystem from 3.6.0 to 3.7.1
update gatsby-transformer-sharp from 3.6.0 to 3.7.1

Author: rodneylab