Update optional requirements

optional-requirements.txt

@@ -1,5 +1,5 @@
 # GDrive Integration
-google-api-python-client>=1.7.11,<1.8.0
+google-api-python-client>=1.7.11,<1.13.0
 gevent>20.6.0,<21.2.0
 greenlet>=0.4.17,<1.1.0
 httplib2>=0.9.2,<0.18.0
@@ -17,7 +17,7 @@ goodreads>=0.3.2,<0.4.0
 python-Levenshtein>=0.12.0,<0.13.0
 
 # ldap login
-python-ldap>=3.0.0,<3.3.0
+python-ldap>=3.0.0,<3.4.0
 Flask-SimpleLDAP>=1.4.0,<1.5.0
 
 #oauth
@@ -25,7 +25,7 @@ Flask-Dance>=1.4.0,<3.1.0
 SQLAlchemy-Utils>=0.33.5,<0.37.0
 
 # extracting metadata
-lxml>=3.8.0,<4.6.0
+lxml>=3.8.0,<4.7.0
 rarfile>=2.7
 
 # other