Update README.md

Update README.md according to #40

bugfix

Exception was occurring when the value of SK or PK was 0.

Update README.md

Merge pull request #34 from kitar/batch-write-item

Merge pull request #31 from kitar/php82

Support PHP 8.2

Merge pull request #23 from lucasgiovanny/patch-1

Add a protocol by default on config endpoint

Revert "Update require-dev packages"

This reverts commit ce6420e.

tidy

Do not unset DynamoDB Client on disconnect until implement reconnect …

…method.