Use correct name for Beautiful Soup in dependencies (#1296)

As noted at https://pypi.org/project/bs4/, the official name of the
Beautiful Soup package is beautifulsoup4, while bs4 is just an alias. In
distribution packaging (such as Fedora) the package may not be available
under this alias, so it's better to use the official name.

Signed-off-by: Ondrej Mosnáček <[email protected]>

Author: WOnder93

requirements.txt

@@ -5,5 +5,5 @@ oauthlib
 requests_oauthlib
 requests-kerberos==0.14.0
 jmespath
-bs4
+beautifulsoup4
 lxml

tox.ini

@@ -11,7 +11,7 @@ deps =
     pytest-cov
     coverage
     requests
-    bs4
+    beautifulsoup4
 commands =
     coverage erase
     pytest -v --cov=atlassian --cov-branch --cov-report=xml