Update version to 0.6.13 for release

cps/constants.py

@@ -157,7 +157,7 @@ def selected_roles(dictionary):
 BookMeta = namedtuple('BookMeta', 'file_path, extension, title, author, cover, description, tags, series, '
                                   'series_id, languages, publisher')
 
-STABLE_VERSION = {'version': '0.6.13 Beta'}
+STABLE_VERSION = {'version': '0.6.13'}
 
 NIGHTLY_VERSION = {}
 NIGHTLY_VERSION[0] = '$Format:%H$'

setup.cfg

@@ -48,6 +48,7 @@ install_requires =
     tornado>=4.1,<6.2
     Wand>=0.4.4,<0.7.0
     unidecode>=0.04.19,<1.3.0
+    lxml>=3.8.0,<4.7.0
 
 [options.extras_require]
 gdrive =
@@ -76,8 +77,8 @@ oauth =
     Flask-Dance>=2.0.0,<5.1.0
     SQLAlchemy-Utils>=0.33.5,<0.38.0
 metadata =
-    lxml>=3.8.0,<4.7.0
     rarfile>=2.7
+    scholarly>=1.2.0, <1.3
 comics =
     natsort>=2.2.0,<7.2.0
     comicapi>= 2.2.0,<2.3.0