Update CI

Author: Oliver Borchert

.circleci/config.yml

@@ -35,8 +35,7 @@ jobs:
 
                 mv _static static
                 for file in ./**/*.html; do
-                    cat $file | sed 's/_static/static/g' > ${file}_
-                    mv ${file}_ $file
+                    sed -i 's/_static/static/g' $file
                 done
 
                 git init

docs/conf.py

@@ -2,8 +2,8 @@
 import os
 
 project = 'PyCave'
-version = os.getenv('CIRCLE_TAG')
-release = os.getenv('CIRCLE_TAG')
+version = os.getenv('CIRCLE_TAG', '0.0.0')
+release = os.getenv('CIRCLE_TAG', '0.0.0')
 
 author = 'Oliver Borchert'
 copyright = f'{datetime.datetime.now().year}, {author}' # pylint: disable=redefined-builtin