Add 'prop-types' imports & rewrite your PropTypes statements.

PropTypesTransform.js

module.exports = function(file, api) {
  const j = api.jscodeshift;
  const root = j(file.source);
  let importPropTypes = false;

  const modifyPropTypes = (path) => {
    if (!importPropTypes) importPropTypes = true;
    return {
      type: 'Identifier',
      name: 'PropTypes',
    };
  };

  const propTypesImport = {
    type: 'ImportDeclaration',
    specifiers: [
      {
        type: 'ImportDefaultSpecifier',
        local: {
          type: 'Identifier',
          name: 'PropTypes',
        },
      },
    ],
    source: {
      type: 'Literal',
      value: 'prop-types',
    },
  };

  root.find(j.MemberExpression,
    {
      object: {type: 'Identifier', name: 'React'},
      property: {type: 'Identifier', name: 'PropTypes'},
    })
    .replaceWith(modifyPropTypes);
  if (importPropTypes) {
    root.find(j.ImportDeclaration,
      {
        source: {
          value: 'react',
        },
      })
      .insertAfter(propTypesImport);
  }

  return root.toSource();
};