server (tasks): new `js_modules` implicit task: /!\ either `yarn` (preferred) or `npm` (fallback) is a new dependency This task will install JS modules specified in `browser_meta.js` using either `yarn` or `npm`. A mapping for Brython can also be specified in browser metadata, in this case Python modules will be created and put in the `js_modules` python package.

import os.path

version_file = os.path.join(os.path.dirname(__file__), "VERSION")
try:
    with open(version_file) as f:
        __version__ = f.read().strip()
except NotImplementedError:
    # pyjamas workaround
    __version__ = "0.7.0D"