Bump to latest 0.3.0 release. (#347)

core/Dockerfile

@@ -12,7 +12,7 @@ RUN apk update \
 	&& apk add --no-cache bash su-exec postgresql-client mysql-client curl python py3-setuptools \
 	&& python3 -m pip install -U pip \
         && python3 -m pip install psycopg2 \
-                   mailman==3.2.2 \
+                   mailman==3.3.0 \
                    mailman-hyperkitty==1.1.0 \
                    pymysql \
     && apk del build-deps \

postorius/Dockerfile

@@ -15,8 +15,8 @@ RUN set -ex \
 	   	postgresql-dev mariadb-dev libffi-dev \
 	&& apk add --no-cache --virtual .mailman-rundeps bash libffi \
 	   postgresql-client mysql-client py-mysqldb curl mailcap \
-	&& pip install -U Django==2.1.5 pip \
-	&& pip install postorius==1.2.4 \
+	&& pip install -U Django==2.2 pip \
+	&& pip install postorius==1.3.0 \
 		uwsgi \
 		psycopg2 \
 		dj-database-url \

web/Dockerfile

@@ -16,11 +16,11 @@ RUN set -ex \
 	&& apk add --no-cache --virtual .mailman-rundeps bash sassc \
 	   postgresql-client mysql-client py-mysqldb curl mailcap \
 	   python3 py3-setuptools xapian-core xapian-bindings-python3 libffi \
-	&& python3 -m pip install -U django==2.1.5 pip \
-	&& python3 -m pip install mailmanclient==3.2.2 \
-		postorius==1.2.4 \
-		hyperkitty==1.2.2 \
-		django-mailman3==1.2.0 \
+	&& python3 -m pip install -U django==2.2 pip \
+	&& python3 -m pip install mailmanclient==3.3.0 \
+		postorius==1.3.0 \
+		hyperkitty==1.3.0 \
+		django-mailman3==1.3.0 \
 		whoosh \
 		uwsgi \
 		psycopg2 \