Bump OpenDylan to latest 2020.1 version. (#6093)

frameworks/Dylan/dylan/README.md

@@ -6,7 +6,7 @@
 
 ## Infrastructure Software Versions
 The tests were run with:
-* [OpenDylan 2019.1](https://opendylan.org/documentation/release-notes/2019.1.html)
+* [OpenDylan 2020.1](https://opendylan.org/documentation/release-notes/2020.1.html)
 
 ## Test URLs
 ### Plaintext Test

frameworks/Dylan/dylan/dylan.dockerfile

@@ -5,13 +5,13 @@ RUN apt-get -yqq install libgc-dev libunwind-dev
 
 WORKDIR /opt
 
-RUN wget -q https://opendylan.org/downloads/opendylan/2019.1/opendylan-2019.1-x86_64-linux.tar.bz2
-RUN tar xjf opendylan-2019.1-x86_64-linux.tar.bz2
+RUN wget -q https://github.com/dylan-lang/opendylan/releases/download/v2020.1.0/opendylan-2020.1-x86_64-linux.tar.bz2
+RUN tar xjf opendylan-2020.1-x86_64-linux.tar.bz2
 
 RUN git clone --recursive https://github.com/dylan-lang/http
 RUN git clone https://github.com/dylan-lang/json
 
-ENV PATH /opt/opendylan-2019.1/bin:$PATH
+ENV PATH /opt/opendylan-2020.1/bin:$PATH
 
 WORKDIR /