Add mypy to dependencies

Author: tianyizheng02

Pipfile

@@ -15,6 +15,7 @@ typing = "*"
 black = "*"
 coverage = "*"
 flake8 = "*"
+mypy = "*"
 pre-commit = "*"
 pytest = "*"
 pytest-cov = "*"

Pipfile.lock

@@ -17,6 +17,7 @@ iniconfig==2.0.0
 jinja2==3.1.4
 markupsafe==3.0.2
 mccabe==0.7.0
+mypy==1.14.1
 mypy-extensions==1.0.0
 nodeenv==1.9.1
 packaging==24.2
@@ -39,6 +40,7 @@ sphinxcontrib-htmlhelp==2.1.0
 sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==2.0.0
 sphinxcontrib-serializinghtml==2.0.0
+typing-extensions==4.12.2
 urllib3==1.26.20
 virtualenv==20.28.0
 appdirs==1.4.4
@@ -62,7 +64,6 @@ setuptools==75.6.0
 soupsieve==2.6
 tqdm==4.67.1
 typing==3.7.4.3
-typing-extensions==4.12.2
 w3lib==2.2.1
 websockets==10.4
 zipp==3.21.0