4 new commits pushed to

<https://github.com/pact-foundation/pact-php/tree/master|master>

by YOU54F

<https://github.com/pact-foundation/pact-php/commit/1965a1a2d53ffbab972e315ff49981ecf9738c70|1965a1a2>

- feat: MockServerConfig improvements - allow setting of defaults

<https://github.com/pact-foundation/pact-php/commit/be5dd8d619227196bd46b411a203d56f0818f2c6|be5dd8d6>

- feat: Speed up pact-php - allow floats in healthcheck sleep

<https://github.com/pact-foundation/pact-php/commit/07b12f4180285cdab5bbd89076cefdf8b967162d|07b12f41>

- chore: round float to int microseconds for usleep

<https://github.com/pact-foundation/pact-php/commit/43d2e2ca482b09f7d4ac97353a0aabc9d8bfd2e0|43d2e2ca>

- Merge pull request #322 from pact-foundation/slt-fast pact-foundation/pact-php