Fix.

node_modules/babel-jest/build/index.d.ts

@@ -0,0 +1,16 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+import { Transformer } from '@jest/transform';
+import { TransformOptions } from '@babel/core';
+interface BabelJestTransformer extends Transformer {
+    canInstrument: true;
+}
+declare const transformer: BabelJestTransformer & {
+    createTransformer: (options?: TransformOptions) => BabelJestTransformer;
+};
+export = transformer;
+//# sourceMappingURL=index.d.ts.map

node_modules/babel-jest/build/index.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"index.d.ts","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":"AAAA;;;;;GAKG;AAKH,OAAO,EAAC,WAAW,EAAC,MAAM,iBAAiB,CAAC;AAE5C,OAAO,EAGL,gBAAgB,EAEjB,MAAM,aAAa,CAAC;AASrB,UAAU,oBAAqB,SAAQ,WAAW;IAChD,aAAa,EAAE,IAAI,CAAC;CACrB;AAwGD,QAAA,MAAM,WAAW,EAAE,oBAAoB,GAAG;IACxC,iBAAiB,EAAE,CAAC,OAAO,CAAC,EAAE,gBAAgB,KAAK,oBAAoB,CAAC;CAMzE,CAAC;AAEF,SAAS,WAAW,CAAC"}

node_modules/babel-jest/build/index.js

@@ -0,0 +1,226 @@
+'use strict';
+
+function _crypto() {
+  const data = _interopRequireDefault(require('crypto'));
+
+  _crypto = function _crypto() {
+    return data;
+  };
+
+  return data;
+}
+
+function _fs() {
+  const data = _interopRequireDefault(require('fs'));
+
+  _fs = function _fs() {
+    return data;
+  };
+
+  return data;
+}
+
+function _path() {
+  const data = _interopRequireDefault(require('path'));
+
+  _path = function _path() {
+    return data;
+  };
+
+  return data;
+}
+
+function _core() {
+  const data = require('@babel/core');
+
+  _core = function _core() {
+    return data;
+  };
+
+  return data;
+}
+
+function _chalk() {
+  const data = _interopRequireDefault(require('chalk'));
+
+  _chalk = function _chalk() {
+    return data;
+  };
+
+  return data;
+}
+
+function _slash() {
+  const data = _interopRequireDefault(require('slash'));
+
+  _slash = function _slash() {
+    return data;
+  };
+
+  return data;
+}
+
+function _interopRequireDefault(obj) {
+  return obj && obj.__esModule ? obj : {default: obj};
+}
+
+function _objectSpread(target) {
+  for (var i = 1; i < arguments.length; i++) {
+    var source = arguments[i] != null ? arguments[i] : {};
+    var ownKeys = Object.keys(source);
+    if (typeof Object.getOwnPropertySymbols === 'function') {
+      ownKeys = ownKeys.concat(
+        Object.getOwnPropertySymbols(source).filter(function(sym) {
+          return Object.getOwnPropertyDescriptor(source, sym).enumerable;
+        })
+      );
+    }
+    ownKeys.forEach(function(key) {
+      _defineProperty(target, key, source[key]);
+    });
+  }
+  return target;
+}
+
+function _defineProperty(obj, key, value) {
+  if (key in obj) {
+    Object.defineProperty(obj, key, {
+      value: value,
+      enumerable: true,
+      configurable: true,
+      writable: true
+    });
+  } else {
+    obj[key] = value;
+  }
+  return obj;
+}
+
+const THIS_FILE = _fs().default.readFileSync(__filename);
+
+const jestPresetPath = require.resolve('babel-preset-jest');
+
+const babelIstanbulPlugin = require.resolve('babel-plugin-istanbul'); // Narrow down the types
+
+const createTransformer = (options = {}) => {
+  options = _objectSpread({}, options, {
+    caller: {
+      name: 'babel-jest',
+      supportsStaticESM: false
+    },
+    compact: false,
+    plugins: (options && options.plugins) || [],
+    presets: ((options && options.presets) || []).concat(jestPresetPath),
+    sourceMaps: 'both'
+  });
+
+  function loadBabelConfig(cwd, filename) {
+    // `cwd` first to allow incoming options to override it
+    const babelConfig = (0, _core().loadPartialConfig)(
+      _objectSpread(
+        {
+          cwd
+        },
+        options,
+        {
+          filename
+        }
+      )
+    );
+
+    if (!babelConfig) {
+      throw new Error(
+        `babel-jest: Babel ignores ${_chalk().default.bold(
+          (0, _slash().default)(_path().default.relative(cwd, filename))
+        )} - make sure to include the file in Jest's ${_chalk().default.bold(
+          'transformIgnorePatterns'
+        )} as well.`
+      );
+    }
+
+    return babelConfig;
+  }
+
+  return {
+    canInstrument: true,
+
+    getCacheKey(
+      fileData,
+      filename,
+      configString,
+      {config, instrument, rootDir}
+    ) {
+      const babelOptions = loadBabelConfig(config.cwd, filename);
+      const configPath = [
+        babelOptions.config || '',
+        babelOptions.babelrc || ''
+      ];
+      return _crypto()
+        .default.createHash('md5')
+        .update(THIS_FILE)
+        .update('\0', 'utf8')
+        .update(JSON.stringify(babelOptions.options))
+        .update('\0', 'utf8')
+        .update(fileData)
+        .update('\0', 'utf8')
+        .update(_path().default.relative(rootDir, filename))
+        .update('\0', 'utf8')
+        .update(configString)
+        .update('\0', 'utf8')
+        .update(configPath.join(''))
+        .update('\0', 'utf8')
+        .update(instrument ? 'instrument' : '')
+        .update('\0', 'utf8')
+        .update(process.env.NODE_ENV || '')
+        .update('\0', 'utf8')
+        .update(process.env.BABEL_ENV || '')
+        .digest('hex');
+    },
+
+    process(src, filename, config, transformOptions) {
+      const babelOptions = _objectSpread(
+        {},
+        loadBabelConfig(config.cwd, filename).options
+      );
+
+      if (transformOptions && transformOptions.instrument) {
+        babelOptions.auxiliaryCommentBefore = ' istanbul ignore next '; // Copied from jest-runtime transform.js
+
+        babelOptions.plugins = (babelOptions.plugins || []).concat([
+          [
+            babelIstanbulPlugin,
+            {
+              // files outside `cwd` will not be instrumented
+              cwd: config.rootDir,
+              exclude: []
+            }
+          ]
+        ]);
+      }
+
+      const transformResult = (0, _core().transformSync)(src, babelOptions);
+
+      if (transformResult) {
+        const code = transformResult.code,
+          map = transformResult.map;
+
+        if (typeof code === 'string') {
+          return {
+            code,
+            map
+          };
+        }
+      }
+
+      return src;
+    }
+  };
+};
+
+const transformer = _objectSpread({}, createTransformer(), {
+  // Assigned here so only the exported transformer has `createTransformer`,
+  // instead of all created transformers by the function
+  createTransformer
+});
+
+module.exports = transformer;