Removed requirements.txt and min-versions.

We never verified minimum version requirements for dependencies and
allow higher versions without bounds. We could just as well ignore
versions for now, until Pipfile or something else becomes a standard.

Makefile

@@ -2,9 +2,9 @@ DOCS_ALL = $(shell find docs/ -type f)
 SRC_ALL = $(shell find src/ -type f -name '*.py')
 
 venv: venv/touch-me
-venv/touch-me: setup.py requirements.txt
+venv/touch-me: setup.py
 	test -d venv || python3 -mvenv venv
-	venv/bin/pip install -U pip -r requirements.txt
+	venv/bin/pip install -U pip -e .[dev,test,docs]
 	touch venv/touch-me
 
 docs: build/docs/index.html
@@ -37,4 +37,4 @@ push: test lint
 _PHONY: venv docs dist lint test push clean format
 
 clean:
-	rm -rf venv .tox
+	rm -rf build dist venv .tox .pytest_cache .coverage MANIFEST

requirements.txt

-# development environment: install in development mode
--e .[dev,test,docs]

setup.py

@@ -2,14 +2,15 @@ from setuptools import setup, find_packages
 
 
 def read(name):
-    with open(name, 'r') as fp:
+    with open(name, "r") as fp:
         return fp.read().strip()
 
 
 def get_version():
     import re
+
     pattern = re.compile(r'__version__\s+=\s+(?:"|\')+([^"\']+)(?:"|\')')
-    with open('src/pycdstar3/__init__.py') as fp:
+    with open("src/pycdstar3/__init__.py") as fp:
         for line in fp:
             m = pattern.match(line)
             if m:
@@ -17,53 +18,39 @@ def get_version():
 
 
 setup(
-    name='pycdstar3',
+    name="pycdstar3",
     version=get_version(),
-    author='Marcel Hellkamp',
-    author_email='marc@gsites.de',
-    url='https://gitlab.gwdg.de/cdstar/pycdstar3',
-    license='LICENSE.txt',
+    author="Marcel Hellkamp",
+    author_email="marc@gsites.de",
+    url="https://gitlab.gwdg.de/cdstar/pycdstar3",
+    license="LICENSE.txt",
     description="Library and command-line client to access CDSTAR (3.0+)",
-    long_description=read('README.md'),
-    long_description_content_type='text/markdown',
-    packages=find_packages(where='src'),
-    package_dir={'': 'src'},
-    entry_points={
-        'console_scripts': ['pycdstar3=pycdstar3.__main__:main'],
-    },
+    long_description=read("README.md"),
+    long_description_content_type="text/markdown",
+    packages=find_packages(where="src"),
+    package_dir={"": "src"},
+    entry_points={"console_scripts": ["pycdstar3=pycdstar3.__main__:main"]},
     include_package_data=True,
     zip_safe=False,
-    platforms='any',
-    python_requires='>=3.5',
-    install_requires=[
-        'requests >= 2.22',
-        'requests-toolbelt >= 0.9.1',
-        'tqdm >= 4.32.2',
-        'iso8601 >= 0.1.12',
-    ],
+    platforms="any",
+    python_requires=">=3.5",
+    install_requires=["requests", "requests-toolbelt", "tqdm", "iso8601"],
     extras_require={
-        'dev': ['flake8', 'wheel', 'twine', 'tox', 'black'],
-        'test': [
-            'mock',
-            'pytest>=3.6',
-            'pytest-cov>=2.8.1',
-            'coverage>=4.2',
-            'responses>=0.10',
-        ], 'docs': [
-            'sphinx>=2.2.0',
-        ],
+        "dev": ["flake8", "wheel", "twine", "tox", "black"],
+        "test": ["mock", "pytest", "pytest-cov", "coverage", "responses"],
+        "docs": ["sphinx"],
     },
     classifiers=[
-        'Development Status :: 2 - Pre-Alpha',
-        'Intended Audience :: Developers',
-        'License :: OSI Approved :: Apache Software License',
-        'Natural Language :: English',
-        'Operating System :: OS Independent',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
-        'Programming Language :: Python :: 3.7',
-        'Programming Language :: Python :: Implementation :: CPython',
-        'Programming Language :: Python :: Implementation :: PyPy'
+        "Development Status :: 2 - Pre-Alpha",
+        "Intended Audience :: Developers",
+        "License :: OSI Approved :: Apache Software License",
+        "Natural Language :: English",
+        "Operating System :: OS Independent",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.5",
+        "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: Implementation :: CPython",
+        "Programming Language :: Python :: Implementation :: PyPy",
     ],
 )