Make pip install work.

- Having trouble with recursive dependencies not being installed.
- Try using install_requires in setup.py instead of requirements.txt files.
- Putting back version numbers.

termstr/requirements.txt

@@ -1 +0,0 @@
-cwcwidth==0.1.5

termstr/setup.py

@@ -8,9 +8,11 @@ except ImportError:
 
 
 setup(name="termstr",
+      version="2021.12.16",
       description=("Termstr provides strings with extra terminal styling."),
       url="https://github.com/ahamilton/eris",
       author="Andrew Hamilton",
       author_email="and_hamilton@yahoo.com",
       license="Artistic 2.0",
-      py_modules=["termstr"])
+      py_modules=["termstr"],
+      install_requires=["cwcwidth==0.1.5"])