Remove support for Python 3.7

.github/workflows/tests.yml

@@ -44,7 +44,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.7, 3.8, 3.9, "3.10", "3.11"]
+        python-version: [3.8, 3.9, "3.10", "3.11"]
 
     steps:
     - uses: actions/checkout@v3

README.md

@@ -6,7 +6,7 @@ Plumb a PDF for detailed information about each text character, rectangle, and l
 
 Works best on machine-generated, rather than scanned, PDFs. Built on [`pdfminer.six`](https://github.com/goulu/pdfminer). 
 
-Currently [tested](tests/) on [Python 3.7, 3.8, 3.9, 3.10, 3.11](.github/workflows/tests.yml).
+Currently [tested](tests/) on [Python 3.8, 3.9, 3.10, 3.11](.github/workflows/tests.yml).
 
 Translations of this document are available in: [Chinese (by @hbh112233abc)](https://github.com/hbh112233abc/pdfplumber/blob/stable/README-CN.md).
 

setup.py

@@ -43,14 +43,13 @@ setup(
     package_data={"pdfplumber": ["py.typed"]},
     zip_safe=False,
     tests_require=base_reqs + dev_reqs,
-    python_requires=">=3.7",
+    python_requires=">=3.8",
     install_requires=base_reqs,
     entry_points={"console_scripts": ["pdfplumber = pdfplumber.cli:main"]},
     classifiers=[
         "Intended Audience :: Developers",
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",