Test oldest dependencies

.github/workflows/test.yml

@@ -45,6 +45,10 @@ jobs:
             python-version: 3.8
             tox_env: orange-latest
             name: Latest
+          - os: ubuntu-18.04
+            python-version: 3.7
+            tox_env: orange-oldest
+            name: Oldest dependencies
 
     services:
       postgres:

tox.ini

@@ -38,6 +38,35 @@ deps =
     latest: https://github.com/pyqtgraph/pyqtgraph/archive/refs/heads/master.zip#egg=pyqtgraph
     latest: https://github.com/biolab/orange-canvas-core/archive/refs/heads/master.zip#egg=orange-canvas-core
     latest: https://github.com/biolab/orange-widget-base/archive/refs/heads/master.zip#egg=orange-widget-base
+    oldest: orange-canvas-core==0.1.24
+    oldest: orange-widget-base==4.16.1
+    oldest: AnyQt==0.0.11
+    oldest: pyqtgraph==0.11.1
+    oldest: matplotlib==2.0.0
+    oldest: qtconsole==4.7.2
+    oldest: pygments==2.8.0
+    oldest: pip==9.0
+    oldest: numpy==1.16.0
+    oldest: scipy==0.16.1
+    oldest: scikit-learn==0.23.1
+    oldest: bottleneck==1.0.0
+    oldest: xlrd==0.9.2
+    # oldest: xlsxwriter
+    oldest: chardet==3.0.2
+    oldest: joblib==0.9.4
+    # oldest: keyring
+    # oldest: keyrings.alt
+    oldest: setuptools==36.3
+    # oldest: serverfiles
+    # oldest: networkx
+    oldest: python-louvain==0.13
+    # oldest: requests
+    oldest: openTSNE==0.6.1
+    oldest: baycomp==1.0.2
+    oldest: pandas==1.3.0
+    # oldest: pyyaml
+    # oldest: openpyxl
+    oldest: httpx==0.14.0
 
 commands_pre =
     # Verify installed packages have compatible dependencies