fix: update return type of every method in pulse/every.ts & update database method in Pulse class to be public

[code-xhyun]

• docs: update README.md with links to documentation and website
• fix: update return type of every method in pulse/every.ts
• fix: update database method in Pulse class to be public

[code-xhyun]

:tada: This PR is included in version 1.1.7 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: