Bump lxml from 4.6.2 to 4.6.3

Bumps [lxml](https://github.com/lxml/lxml) from 4.6.2 to 4.6.3.
- [Release notes](https://github.com/lxml/lxml/releases)
- [Changelog](https://github.com/lxml/lxml/blob/master/CHANGES.txt)
- [Commits](lxml/lxml@lxml-4.6.2...lxml-4.6.3)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -9,7 +9,7 @@ hyperlink==19.0.0
 idna==2.10
 incremental==17.5.0
 itemadapter==0.1.0
-lxml==4.6.2
+lxml==4.6.3
 parsel==1.6.0
 pkg-resources==0.0.0
 Protego==0.1.16