Run tests on python 3.11 and 3.12 prelease

.flake8

@@ -1,4 +1,4 @@
 [flake8]
-ignore=W605
+ignore=W605,E275
 exclude=.git,__pycache__,docs,sysdic,work,mecab-ipadic-2.7.0-20070801,benchmark
 max-line-length=120

.github/workflows/checks.yml

@@ -2,17 +2,10 @@ name: Checks
 
 on:
   push:
-    paths:
-    - 'janome/**'
-    - 'tests/**'
-    - 'ipadic/**'
-    - '.github/workflows/**'
+    branches:
+    - 'master'
   pull_request:
-    paths:
-    - 'janome/**'
-    - 'tests/**'
-    - 'ipadic/**'
-    - '.github/workflows/**'
+
 
 jobs:
   test:
@@ -21,7 +14,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ['3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12-dev']
 
     steps:
     - uses: actions/checkout@v2
@@ -31,19 +24,22 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Test
       run: |
-        pip install psutil
+        pip install --upgrade pip
+        pip install --upgrade setuptools
+        pip install -r requirements-dev.txt
         python setup.py test
 
   check:
 
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - uses: actions/setup-python@v1
+    - uses: actions/setup-python@v2
     - name: Unit tests for coverage
       run: |
-        pip install coverage
-        pip install psutil
+        pip install --upgrade pip
+        pip install --upgrade setuptools
+        pip install -r requirements-dev.txt
         python setup.py develop
         coverage run -m unittest discover tests
     - name: Coveralls

janome/tokenizer.py

@@ -114,7 +114,7 @@ class Token(object):
     A Token object contains all information for a token.
     """
 
-    def __init__(self, node: Node, extra: Tuple = None):
+    def __init__(self, node: Node, extra: Optional[Tuple] = None):
         self.node = node
         self.extra = extra
 

requirements-dev.txt

@@ -1,13 +1,9 @@
-autopep8==1.5.4
-flake8==3.8.3
-mccabe==0.6.1
-mypy==0.782
-mypy-extensions==0.4.3
-pycodestyle==2.6.0
-pyflakes==2.2.0
-toml==0.10.1
-typed-ast==1.4.1
-typing-extensions==3.7.4.2
-twine==3.2.0
-wheel==0.35.1
-psutil==5.9.0
+autopep8
+flake8
+mypy
+pyflakes
+toml
+twine
+wheel
+psutil
+coverage