Dependency updates.

* Update sqlalchemy from 1.2.9 to 1.2.10
* Update alembic from 0.9.10 to 1.0.0
* Update twisted from 18.4.0 to 18.7.0
* Update sphinx from 1.7.5 to 1.7.6
* Update mypy from 0.610 to 0.620

requirements.txt

@@ -4,11 +4,11 @@ IPy==0.83              # IP address parsing
 
 # Database connections and management
 psycopg2-binary==2.7.5
-SQLAlchemy==1.2.9
-alembic==0.9.10
+SQLAlchemy==1.2.10
+alembic==1.0.0
 
 # Network handling
-twisted==18.4.0
+twisted==18.7.0
 
 # Testing and related packages
 pytest==3.6.3
@@ -17,10 +17,10 @@ coverage==4.5.1
 coveralls==1.3.0
 
 # Documentation generation
-Sphinx==1.7.5
+Sphinx==1.7.6
 
 # Code style and type checks
-mypy==0.610
+mypy==0.620
 flake8==3.5.0
 pep8-naming==0.7.0