Enhancement: Add link to source to composer.json

[localheinz]

This pull request

• adds a link to the source to composer.json

Follows php-fig/simple-cache#31.

💁‍♂️ For reference, see https://getcomposer.org/doc/04-schema.md#support.

[dbu]

thanks, seems like a good idea to me for when people installed this without git and therefore the link to the source is lost.

[localheinz]

@dbu

It's also nice for people who navigate to composer.json of this package when they install it with composer and want to navigate to the source.

Currently there are some packages in the @php-fig organization that use the homepage field to link to the package, others use the homepage field to link to https://www.php-fig.org.

[dbu]

thank you. https://github.com/php-fig/http-client/releases/tag/1.0.3

[localheinz]

Thank you, @dbu!