Update pypi package versions (requirements.txt)

Required telling prospector to ignore some abstract methods inside
wrapt's ObjectProxy - they're not truly abstract, but will raise
NotImplementedError if they're called, so I guess pylint detects those
as abstract.

tildes/requirements.txt

@@ -1,20 +1,20 @@
 ago==0.0.93
-alembic==1.0.5
+alembic==1.0.6
 amqpy==0.13.1
 appdirs==1.4.3
-argon2-cffi==18.3.0
+argon2-cffi==19.1.0
 astroid==2.0.4
 atomicwrites==1.2.1
 attrs==18.2.0
 backcall==0.1.0
 beautifulsoup4==4.7.1
 black==18.9b0
-bleach==3.0.2
+bleach==3.1.0
 certifi==2018.11.29
 cffi==1.11.5
 chardet==3.0.4
 Click==7.0
-cornice==3.4.4
+cornice==3.5.0
 decorator==4.3.0
 dodgy==0.1.9
 freezegun==0.3.11
@@ -30,10 +30,10 @@ Jinja2==2.10
 lazy-object-proxy==1.3.1
 Mako==1.0.7
 MarkupSafe==1.1.0
-marshmallow==2.17.0
+marshmallow==2.18.0
 mccabe==0.6.1
 more-itertools==5.0.0
-mypy==0.650
+mypy==0.660
 mypy-extensions==0.4.1
 parso==0.3.1
 PasteDeploy==2.0.1
@@ -43,11 +43,11 @@ pickleshare==0.7.5
 Pillow==5.4.1
 plaster==1.0
 plaster-pastedeploy==0.6
-pluggy==0.8.0
+pluggy==0.8.1
 prometheus-client==0.5.0
 prompt-toolkit==2.0.7
 prospector==1.1.6.2
-psycopg2==2.7.6.1
+psycopg2==2.7.7
 ptyprocess==0.6.0
 publicsuffix2==2.20160818
 py==1.7.0
@@ -70,25 +70,25 @@ pyramid-mako==1.0.2
 pyramid-session-redis==1.4.1
 pyramid-tm==2.2.1
 pyramid-webassets==0.10
-pytest==4.1.0
+pytest==4.1.1
 pytest-mock==1.10.0
 python-dateutil==2.7.5
 python-editor==1.0.3
 PyYAML==3.13
-qrcode==6.0
+qrcode==6.1
 redis==3.0.1
 repoze.lru==0.7
 requests==2.21.0
 requirements-detector==0.6
-sentry-sdk==0.6.6
+sentry-sdk==0.6.9
 setoptconf==0.2.0
 simplejson==3.16.0
 six==1.12.0
 snowballstemmer==1.2.1
-soupsieve==1.6.2
-SQLAlchemy==1.2.15
-SQLAlchemy-Utils==0.33.10
-stripe==2.17.0
+soupsieve==1.7.3
+SQLAlchemy==1.2.16
+SQLAlchemy-Utils==0.33.11
+stripe==2.18.1
 testing.common.database==2.0.3
 testing.redis==1.1.1
 titlecase==0.12.0
@@ -96,17 +96,17 @@ toml==0.10.0
 traitlets==4.3.2
 transaction==2.4.0
 translationstring==1.3
-typed-ast==1.1.1
+typed-ast==1.2.0
 urllib3==1.24.1
-venusian==1.1.0
-waitress==1.1.0
+venusian==1.2.0
+waitress==1.2.0
 wcwidth==0.1.7
 webargs==4.4.1
 webassets==0.12.1
 webencodings==0.5.1
 WebOb==1.8.5
 WebTest==2.0.32
-wrapt==1.10.11
+wrapt==1.11.1
 zope.deprecation==4.4.0
 zope.interface==4.6.0
 zope.sqlalchemy==1.1

tildes/tildes/models/comment/comment_tree.py

@@ -223,6 +223,7 @@ class CommentTree:
 
 
 class CommentInTree(ObjectProxy):
+    # pylint: disable=abstract-method
     """Wrapper for Comments inside a CommentTree that adds some methods/properties."""
 
     def __init__(self, comment: Comment):