TypeScript & Jest setup cleanup

babel.config.js

@@ -0,0 +1,3 @@
+module.exports = {
+  presets: ['babel-preset-gatsby', '@babel/preset-typescript']
+}

gatsby-config.js

@@ -231,7 +231,6 @@ module.exports = {
     'gatsby-redirect-from',
     'gatsby-plugin-meta-redirect',
     'gatsby-plugin-offline',
-    'gatsby-plugin-typescript',
     'gatsby-plugin-webpack-size'
     // {
     //   resolve: 'gatsby-plugin-webpack-bundle-analyser-v2',

jest.config.js

@@ -1,16 +1,10 @@
 module.exports = {
-  transform: {
-    '^.+\\.(tsx?|jsx?)$': 'ts-jest',
-    '^.+\\.jsx?$': '<rootDir>/jest/jest-preprocess.js'
-  },
-  testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.([tj]sx?)$',
   moduleNameMapper: {
     '.+\\.(css|styl|less|sass|scss)$': 'identity-obj-proxy',
     '.+\\.(jpg|jpeg|png|gif|eot|otf|webp|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$':
       '<rootDir>/jest/__mocks__/file-mock.js',
     '\\.svg': '<rootDir>/jest/__mocks__/svgr-mock.js'
   },
-  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
   testPathIgnorePatterns: ['node_modules', '.cache', 'public', 'coverage'],
   transformIgnorePatterns: ['node_modules/(?!(gatsby)/)'],
   globals: {

jest/jest-preprocess.js

@@ -1,7 +0,0 @@
-const { createTransformer } = require('babel-jest')
-
-const babelOptions = {
-  presets: ['babel-preset-gatsby', '@babel/preset-typescript']
-}
-
-module.exports = createTransformer(babelOptions)

package.json

@@ -55,7 +55,6 @@
     "gatsby-plugin-sharp": "^2.6.2",
     "gatsby-plugin-sitemap": "^2.4.2",
     "gatsby-plugin-svgr": "^2.0.2",
-    "gatsby-plugin-typescript": "^2.4.2",
     "gatsby-plugin-use-dark-mode": "^1.1.2",
     "gatsby-plugin-webpack-size": "^1.0.0",
     "gatsby-redirect-from": "^0.2.1",
@@ -91,7 +90,6 @@
   },
   "devDependencies": {
     "@babel/node": "^7.8.7",
-    "@babel/preset-env": "^7.9.6",
     "@babel/preset-typescript": "^7.9.0",
     "@svgr/webpack": "^5.4.0",
     "@testing-library/jest-dom": "^5.6.0",
@@ -111,7 +109,6 @@
     "@typescript-eslint/parser": "^2.31.0",
     "@welldone-software/why-did-you-render": "^4.2.0",
     "babel-eslint": "^10.1.0",
-    "babel-jest": "^25.5.1",
     "eslint": "^6.8.0",
     "eslint-config-prettier": "^6.11.0",
     "eslint-loader": "^4.0.2",
@@ -123,7 +120,7 @@
     "fs-extra": "^9.0.0",
     "gatsby-plugin-webpack-bundle-analyser-v2": "^1.1.9",
     "identity-obj-proxy": "^3.0.0",
-    "jest": "^25.5.4",
+    "jest": "^26.0.1",
     "markdownlint-cli": "^0.23.0",
     "node-iptc": "^1.0.5",
     "node-sass": "^4.14.1",
@@ -136,7 +133,6 @@
     "stylelint-config-prettier": "^8.0.1",
     "stylelint-config-standard": "^20.0.0",
     "stylelint-prettier": "^1.1.2",
-    "ts-jest": "^25.5.0",
     "typescript": "^3.8.3"
   },
   "repository": {