Bump version to `v1.8.0`

Merge pull request #132 from javaistic/update-version

Bump version from `v1.6.0` to `v1.7.0`

Merge pull request #72 from javaistic/patch

Enhancement

Merge pull request #38 from javaistic/add-opensource-block

Add OpenSource block

Merge pull request #9 from javaistic:pkg-update

Update package files

Update class to classNames

Add meta description

Add Sponsor button

Update sitemap