upgrade obfs4proxy package from v0.0.11-r7 to v0.0.13-r0

https://web.archive.org/web/20220702114220/https://gitweb.torproject.org/pluggable-transports/obfs4.git/tree/ChangeLog
https://git.alpinelinux.org/aports/commit/testing/obfs4proxy?id=44f314e8b023951f6cf740edb21bc90103f5781b

Dockerfile

@@ -2,7 +2,7 @@
 FROM docker.io/alpine:3.16.0
 
 ARG TOR_PACKAGE_VERSION=0.4.7.8-r0
-ARG OBFS4PROXY_PACKAGE_VERSION=0.0.11-r7
+ARG OBFS4PROXY_PACKAGE_VERSION=0.0.13-r0
 RUN apk add --no-cache tor=$TOR_PACKAGE_VERSION \
     && apk add --no-cache obfs4proxy=$OBFS4PROXY_PACKAGE_VERSION \
         --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing