Bump xmlschema from 1.0.7 to 1.0.14

Bumps [xmlschema](https://github.com/brunato/xmlschema) from 1.0.7 to 1.0.14.
- [Release notes](https://github.com/brunato/xmlschema/releases)
- [Changelog](https://github.com/sissaschool/xmlschema/blob/master/CHANGELOG.rst)
- [Commits](sissaschool/xmlschema@v1.0.7...v1.0.14)

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

requirements.txt

@@ -1,6 +1,6 @@
 packageurl_python==0.8.1
 requests==2.20.1
-xmlschema==1.0.7
+xmlschema==1.0.14
 setuptools==18.5
 requirements_parser==0.1.0
 packaging==19.0

setup.py

@@ -14,7 +14,7 @@
     install_requires=[
         'requirements_parser==0.1.0',
         'packageurl_python==0.8.1',
-        'xmlschema==1.0.7',
+        'xmlschema==1.0.14',
         'requests==2.20.1',
         'packaging==19.0',
     ],