This commit removes validators described in #1642, refactoring
to clean up after their removal.
- Url was refactored to use the function `filter_var` instead.
- tests/bootstrap.php is no longer needed and was removed.
- Updated migration guide with recommendations for replacements.
This commit introduces a new feature test: SerializableTest, that
tests several validators for their ability to be serialized and
unserialized.
It also makes it so that the same list of validators can be used
by both simple benchmarks and "smoke tests" of all kinds, including
this serialize/unserialize one.
Additionally, the FilterVar validator was modified. Previously, due
to the use of Callback, it was not serializable, but now it is.
This commit is the first step in setting up *Continuous Performance*
for the repository.
- Adds phpbench/phpbench to dev dependencies.
- Adds an initial `ValidatorBench.php` file with validate benchmarks
for several validators.
- Adds `composer bench` script to run benchmarks.
- Adds `composer bench:profile` script to generate profiles.
