Investigate browserify JS modules

[mlnmln]

When importing factorial-components-image from remote.

$ browserify source/index.js -o public/index.js -t [ babelify --presets [ env ] ]

/Users/milanmatull/Documents/dev/web/factorial-patterns-test/node_modules/factorial-components-image/components-image.js:6
import 'picturefill';
^
ParseError: 'import' and 'export' may appear only with 'sourceType: module'
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

[mlnmln]

Browserify expects commonjs modules, needs a build step to UMD format.