This PR adds support for escaped characters prefixed by a backslash. However it does not fully implements the spec (https://www.w3.org/TR/CSS21/syndata.html#characters): support for ISO code escaping sequences and backslashes followed by a newline in strings will need to be implemented in a separate PR.
This PR adds support for escaped characters prefixed by a backslash. However it does not fully implements the spec (https://www.w3.org/TR/CSS21/syndata.html#characters): support for ISO code escaping sequences and backslashes followed by a newline in strings will need to be implemented in a separate PR.
Fixes #110