upgrade to wiki 0.12.2

includes update to client and several plugins:
calendar, markdown, and html

Dockerfile

@@ -6,7 +6,7 @@ RUN useradd --create-home app \
     jq \
     git
 WORKDIR /home/app
-ARG WIKI_PACKAGE=wiki@0.12.1
+ARG WIKI_PACKAGE=wiki@0.12.2
 RUN su app -c "npm install -g --prefix . $WIKI_PACKAGE"
 RUN su app -c "mkdir .wiki"
 COPY configure-and-launch-wiki set-owner-name ./

README.md

@@ -55,8 +55,8 @@ Open http://that.localtest.me:3000 in another.
 This image's tag matches the version of the included wiki software.
 
 ``` bash
-git tag -am "" '0.12.1+github'
+git tag -am "" '0.12.2'
 git push --tags
-docker build -t dobbs/farm:0.12.1+github .
-docker push dobbs/farm:0.12.1+github
+docker build -t dobbs/farm:0.12.2 .
+docker push dobbs/farm:0.12.2
 ```