* Fix require-unicode-regexp issues
See [`require-unicode-regexp`](https://eslint.org/docs/rules/require-unicode-regexp) for more information.
This change enables `require-unicode-regexp` and fixes the issues raised by the rule.
* Remove case-insensitive flag from regexps
Our source maps were being corrupted during minification, because the
`gulp-terser-js` plugin we were using didn't account for the existence
of sourcemaps in the input. A configuration option to allow the input
of sourcemaps was added in v5.2.0. The plugin has been updated, and we
now use this option.
Previously the generated sourcemaps had an invalid entry in the
"sources" array, with the filename of the bundle itself. This was not a
real source. After this change, this invalid source is no longer
present.
The Sentry DSN is now expected to be provided via environment variable
for production builds. The build script will fail if it is missing, and
an error will be thrown at runtime if it is missing.
The `SENTRY_DSN` environment variable has been set in CI to the old
value for `SENTRY_PROD_DSN`. We can migrate to a new DSN at some point
in the future.
The MetaMetrics project ID can now be set via environment variable. It
has not been set yet in practice, so for now the old project IDs will
still be used. This is in preparation for migrating to a new project.
We were including the polyfill for the `Intl.RelativeTimeFormat` API,
but we weren't including any locale data. This polyfill doesn't work
without the locale data for whichever locale you're formatting.
The data for all locales we support is now included. The locale data
is loaded from disk as-needed (during app startup, and upon each change
in locale).
The official npm package for Font Awesome Free is now used instead of
the vendored styles. Previously we had been using v4.4.0, now we're
using v5.13.0.
We're now importing the Font Awesome SCSS modules instead of using the
minified CSS bundle. This integrates more cleanly into our build
system, and it lets us use their mixins directly in the future if we
need to.
The variable `fa-font-path` has been set to reference our font
directory, as instructed here:
https://fontawesome.com/how-to-use/on-the-web/using-with/sass#compile
