fix: enqueue excluded, add local dev and ci

[kasparsd]

Fixes #96

• Add wp-env as local dep.
• Switch from Travis to GH actions.

[kasparsd]

This now combines the excluded items with their deps.

[szepeviktor]

@kasparsd Some PHPStan findings.

diff --git a/src/minit-asset-cache.php b/src/minit-asset-cache.php
index c0abf70..5b4eab6 100644
--- a/src/minit-asset-cache.php
+++ b/src/minit-asset-cache.php
@@ -146,7 +146,7 @@ class Minit_Asset_Cache {
    public function files() {
        $files = glob( $this->dir() . '/*', GLOB_NOSORT );

-       if ( ! empty( $files ) && is_array( $files ) ) {
+       if ( ! empty( $files ) ) {
            return $files;
        }

diff --git a/src/minit-plugin.php b/src/minit-plugin.php
index 4cc8b85..a7c3cbe 100644
--- a/src/minit-plugin.php
+++ b/src/minit-plugin.php
@@ -73,19 +73,19 @@ class Minit_Plugin {
    /**
     * Bump the cache version to bust the cache.
     *
-    * @return boolean
+    * @return void
     */
    public function cache_bump() {
-       return $this->minit_cache->bump();
+       $this->minit_cache->bump();
    }

    /**
     * Delete all the cache files.
     *
-    * @return boolean
+    * @return void
     */
    public function cache_purge() {
-       return $this->minit_cache->purge();
+       $this->minit_cache->purge();
    }

    public function init() {

[kasparsd]

Thank you @szepeviktor! I'll add phpstan soon!

Most of the code was written 10 years ago and I don't relate to a lot of choices made then :)