- update to 2.1.0:
- **NEW**: Officially support Python 3.9.
- **NEW**: Drop official support for Python 3.5.
- **NEW**: In order to avoid conflicts with future CSS specification changes,
non-standard pseudo classes will now start with the `:-soup-` prefix. As a
consequence, `:contains()` will now be known as `:-soup-contains()`, though
for a time the deprecated form of `:contains()` will still be allowed with
a warning that users should migrate over to
`:-soup-contains()`.
- **NEW**: Added new non-standard pseudo class `:-soup-contains-own()` which
operates similar to `:-soup-contains()` except that it only looks at text
nodes directly associated with the currently scoped element and not its
descendants.
- **FIX**: Import `bs4` globally instead of in local functions as it appears
there are no adverse affects due to circular imports as `bs4` does not
immediately reference `soupsieve` functions and `soupsieve` does not
immediately reference `bs4` functions. This should give a performance
boost to functions that had previously included `bs4` locally.