Fix tox -e pep8 and update CI (#109)

* Update CI
* Require Python 3.7

Author: vstinner

.github/workflows/build.yml

@@ -12,18 +12,18 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python: ['3.11']
+        python: ['3.14']
         include:
           # Python 3.6 uses old Ubuntu 20.04
-          - os: ubuntu-20.04
-            python: '3.6'
+          - os: ubuntu-22.04
+            python: '3.7'
 
     steps:
         # https://github.com/actions/checkout
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Setup Python
         # https://github.com/actions/setup-python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python }}
       - name: Install Tox and any other packages

README.rst

@@ -37,4 +37,4 @@ Command line tools using Hachoir parsers:
 
 Installation instructions: http://hachoir.readthedocs.io/en/latest/install.html
 
-Hachoir is written for Python 3.6 or newer.
+Hachoir is written for Python 3.7 or newer.

doc/install.rst

@@ -16,4 +16,4 @@ To use hachoir-wx, you will also need to install `wxPython
 
     python3 -m pip install -U wxPython
 
-Hachoir requires Python 3.6 or newer.
+Hachoir requires Python 3.7 or newer.

hachoir/parser/program/java.py

@@ -118,7 +118,6 @@ def eat_descriptor(descr):
         type = descr[1:end]
         descr = descr[end:]
     else:
-        global code_to_type_name
         try:
             type = code_to_type_name[descr[0]]
         except KeyError: