Drop teststs and support for python 3.7

Author: PrimozGodec

.github/workflows/doc.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: False
       matrix:
-        python: [3.7]
+        python: [3.9]
         os: [ubuntu-18.04]
 
     steps:

.github/workflows/test.yml

@@ -37,16 +37,16 @@ jobs:
       fail-fast: False
       matrix:
         os: [ubuntu-20.04]
-        python-version: [3.7, 3.8, 3.9, '3.10']
+        python-version: [3.8, 3.9, '3.10']
         tox_env: [orange-released]
         name: [Released]
         include:
           - os: ubuntu-20.04
-            python-version: 3.8
+            python-version: '3.10'
             tox_env: orange-latest
             name: Latest
           - os: ubuntu-18.04
-            python-version: 3.7
+            python-version: 3.8
             tox_env: orange-oldest
             name: Oldest dependencies
           - os: ubuntu-20.04
@@ -113,20 +113,20 @@ jobs:
       fail-fast: false
       matrix:
         os: [macos-11, windows-2019]
-        python-version: [3.7, 3.8, 3.9, '3.10']
+        python-version: [3.8, 3.9, '3.10']
         tox_env: [orange-released]
         name: [Released]
         include:
           - os: windows-latest
-            python-version: 3.8
+            python-version: '3.10'
             tox_env: orange-latest
             name: Latest
           - os: macos-11
-            python-version: 3.8
+            python-version: '3.10'
             tox_env: orange-latest
             name: Latest
           - os: windows-latest
-            python-version: 3.9
+            python-version: '3.10'
             tox_env: pyqt6
             name: PyQt6
           - os: macos-11

requirements-core.txt

@@ -6,7 +6,7 @@ scipy>=1.3.1
 scikit-learn>=1.0.1
 bottleneck>=1.3.4
 # Reading Excel files
-xlrd>=0.9.2
+xlrd>=1.2.0
 # Writing Excel Files
 xlsxwriter
 # Encoding detection

requirements-gui.txt

@@ -5,6 +5,6 @@ AnyQt>=0.1.0
 
 # ignore pyqtgraph 0.12.4 due to https://github.com/pyqtgraph/pyqtgraph/issues/2237
 pyqtgraph>=0.12.2,!=0.12.4
-matplotlib>=2.2.5
+matplotlib>=3.2.0
 qtconsole>=4.7.2
 pygments>=2.8.0

tox.ini

@@ -44,15 +44,15 @@ deps =
     oldest: orange-widget-base==4.18.0
     oldest: AnyQt==0.1.0
     oldest: pyqtgraph==0.11.1
-    oldest: matplotlib==2.2.5
+    oldest: matplotlib==3.2.0
     oldest: qtconsole==4.7.2
     oldest: pygments==2.8.0
     oldest: pip==18.0
     oldest: numpy==1.17.3
     oldest: scipy==1.3.1
     oldest: scikit-learn==1.0.1
     oldest: bottleneck==1.3.4
-    oldest: xlrd==0.9.2
+    oldest: xlrd==1.2.0
     # oldest: xlsxwriter
     oldest: chardet==3.0.2
     oldest: joblib==0.11