Cleanup configs and improve docs

Author: marcospassos

.gitignore

@@ -1,4 +1,3 @@
-/.cache
 /composer.lock
 /vendor
 /phpcs.xml

README.md

@@ -15,7 +15,7 @@ generated by ANTLR4. The runtime provides a common set of tools for using your p
 Install the runtime with Composer:
 
 ```bash
-composer install antlr/antlr4
+composer require antlr4-php-runtime
 ```
 
 #### 3. Generate your parser
@@ -115,6 +115,7 @@ The expected output is:
 * [Official site](http://www.antlr.org/)
 * [Documentation](https://github.com/tunnelvisionlabs/antlr4/blob/master/doc/index.md)
 * [Getting started with v4](https://github.com/tunnelvisionlabs/antlr4/blob/master/doc/getting-started.md)
+* [PHPStan Exension](https://github.com/antlr/antlr-php-runtime-phpstan)
 * [FAQ](https://github.com/tunnelvisionlabs/antlr4/blob/master/doc/faq/index.md)
 
 ### The Definitive ANTLR 4 Reference

composer.json

@@ -2,6 +2,7 @@
   "name": "antlr/antlr4-php-runtime",
   "type": "library",
   "description": "PHP 7 runtime for ANTLR 4",
+  "keywords": ["antlr4", "php", "runtime"],
   "license": [
     "BSD-3-Clause"
   ],
@@ -13,7 +14,6 @@
   },
   "require-dev": {
     "phpstan/phpstan": "^0.11.4",
-    "phpunit/phpunit": "^8.0.4",
     "slevomat/coding-standard": "^5.0.4",
     "squizlabs/php_codesniffer": "^3.4.1",
     "phpstan/extension-installer": "^1.0"

phpcs.xml.dist

@@ -8,16 +8,13 @@
 
     <config name="installed_paths" value="../../slevomat/coding-standard/SlevomatCodingStandard"/>
 
-    <arg name="cache" value=".cache/phpcs.cache.json"/>
     <arg name="basepath" value="."/>
     <arg name="extensions" value="php"/>
     <arg name="colors" />
 
     <!-- show progress of the run and show sniff names -->
     <arg value="ps"/>
 
-    <!-- Generic sniffs -->
-
     <!-- Force array element indentation with 4 spaces -->
     <rule ref="Generic.Arrays.ArrayIndent"/>
     <!-- Disallow `array(...)` -->

phpstan.neon.dist

@@ -4,4 +4,3 @@ includes:
 parameters:
     level: max
     paths: [src]
-    tmpDir: '%rootDir%/.cache/phpstan'