Upgrade MDX to v1.0
Update dependencies
"@emotion/core": "^10.0.5" -> "^10.0.10"
"@emotion/styled": "^10.0.5" -> "^10.0.10"
"@mdx-js/mdx": "^0.16.6" -> "^1.0.19"
"@mdx-js/tag": "^0.16.6" -> "^1.0.16"
"gatsby-mdx": "^0.3.4" -> "^0.6.3"
Update dev dependencies
babel-preset-gatsby: "^0.1.6" -> "^0.1.11"
gatsby: "^2.2.5" -> "^2.4.6"
prettier": "1.14.3" -> "1.17.1"
react": "^16.8.0" -> "^16.8.6"
react-dom": "^16.8.0" -> "^16.8.6"