Update MANIFEST.in; remove appveyor.yml

CI has been moved to GitHub since #267

Remove Travis/CircleCI/AppVeyor files and other no longer existing files from MANIFEST

Update filenames in MANIFEST. For example, CHANGLOG.rst (old) --> CHANGELOG.md (new).

Signed-off-by: Arthit Suriyawongkul <arthit@gmail.com>

Author: bact

MANIFEST.in

@@ -1,21 +1,16 @@
-graft data
 graft examples
-graft spdx
+graft src
 graft tests
 
 prune src/spdx_tools.egg-info
 
-include spdx/licenses.json
+include .gitignore
 include README.md
-include CHANGELOG.rst
+include CHANGELOG.md
+include CONTRIBUTING.md
+include DOCUMENTATION.md
 include LICENSE
-include MANIFEST.in
 include setup.py
-include setup.cfg
-include .gitignore
-include MANIFEST.in
-include .travis.yml
-include circle.yml
-include appveyor.yml
+include pyproject.toml
 
-global-exclude *.py[co] __pycache__ *.*~
+global-exclude *.py[co] __pycache__ *.*~ .DS_Store .pytest_cache .mypy_cache