Implement validation rule builder and parser (#20)

* WIP: Implement a documentated validation through builder

Allow the validation to the endpoints to be declared through a validation rule
builder that can then also be used to generate documentation from these defined
rules.

Each rule is stored as an object that has a documentation line associated with
it. This method, while repetitive, ensures that the validation rules remain
compatible with Laravel's validator while still remaining discoverable through
code.

* Add more validation rules

* Start work on recursive validation rules and rendering docs

* WIP: Object rule builder

* Rewrite validation builder structure to allow nesting

Objects and arrays can now be nested arbitrarily deep.

* Add more testing of the validation rules

* Fix incorrect namespace for RulesTest

* Update travis with codecov

* Add code coverage badge to readme

* Show the array types in the documentation

* Fix array validation when element type is defined

* Add typescript interface of the validation rules

* Remove dead code

* Fix many docs and type errors

phpstan level set to the highest level 8

* Add missing import

* Fix remainder of type errors

.travis.yml

@@ -20,4 +20,7 @@ install:
   - travis_retry composer update --prefer-dist --no-interaction --prefer-stable --no-suggest
 
 script:
-  - composer test
+  - composer test -- --coverage-clover=coverage.xml
+
+after_success:
+  - bash <(curl -s https://codecov.io/bash)

README.md

@@ -1,6 +1,7 @@
 # Apitizer
 
 [![Build Status](https://travis-ci.org/drtheuns/apitizer_php.svg?branch=master)](https://travis-ci.org/drtheuns/apitizer_php)
+[![codecov](https://codecov.io/gh/drtheuns/apitizer_php/branch/master/graph/badge.svg)](https://codecov.io/gh/drtheuns/apitizer_php)
 
 Apitizer is a Laravel library that primarily offers a Query Builder that allows
 you to easily create documented API endpoints that are capable of filtering,

composer.json

@@ -17,7 +17,8 @@
     "require-dev": {
         "phpunit/phpunit": "^8.5",
         "orchestra/testbench": "^4.0",
-        "mockery/mockery": "^1.3"
+        "mockery/mockery": "^1.3",
+        "nunomaduro/larastan": "^0.5.2"
     },
     "autoload": {
         "psr-4": {
@@ -38,6 +39,7 @@
     },
     "scripts": {
       "test": "./vendor/bin/phpunit",
-      "coverage": "./vendor/bin/phpunit --coverage-html coverage"
+      "coverage": "./vendor/bin/phpunit --coverage-html coverage",
+      "analyse": "./vendor/bin/phpstan analyse"
     }
 }