Bump version to 2.0.0a7

Merge pull request #60 from SpM-lab/59-bump-version-to-200a6

Bump to v2.0.0a6

Merge pull request #50 from SpM-lab/49-support-libsparseir-05x

49 support libsparseir 05x

Merge pull request #46 from SpM-lab/45-bump-to-v200a3

Bump to v2.0.0a3

bump to v2.0.0a2

Merge pull request #39 from SpM-lab/35-version-2xx

Add conda-related CI files

Update workflows & bump to v1.1.7

Update workflows & bump to v1.1.6

Update workflows & bump to v1.1.5

Update workflows & bump to v1.1.4