Adjust cache handling

Bugfix

.gitignore

@@ -0,0 +1 @@
+.idea/

composer.json

@@ -4,7 +4,7 @@
     "keywords": ["laravel", "api-wrapper", "igdb", "igdb-api", "apicalypse", "wrapper"],
     "require": {
         "php": "^7.1.3",
-        "laravel/framework": "5.7.*|5.8.*",
+        "laravel/framework": "5.8.*",
         "guzzlehttp/guzzle": "~6.0",
         "ext-json": "*"
     },

config/config.php

@@ -8,11 +8,12 @@
 
     /*
      * This package caches queries automatically.
-     * Here you can set how long each query should be cached.
+     * Here you can set how long (in seconds) each query should be cached (by
+     * default).
      *
      * To turn cache off set this value to 0
      */
-    'cache_lifetime' => env('IGDB_CACHE_LIFETIME', 60),
+    'cache_lifetime' => env('IGDB_CACHE_LIFETIME', 3600),
 
     /*
      * This is the per-page limit for your tier ("Free" by default)

src/Builder.php

@@ -269,7 +269,7 @@ public function where(
         $value = null,
         $boolean = '&'
     ) {
-        if (is_callable($key)) {
+        if ($key instanceof Closure) {
             return $this->whereNested($key, $boolean);
         }
 
@@ -1284,13 +1284,13 @@ public function with(array $relationships)
     /**
      * Overwrite the cache lifetime for this query.
      *
-     * @param int $minutes
+     * @param mixed $seconds
      *
      * @return $this
      */
-    public function cache(int $minutes): self
+    public function cache($seconds): self
     {
-        $this->cacheLifetime = $minutes;
+        $this->cacheLifetime = $seconds;
 
         return $this;
     }
@@ -1406,7 +1406,7 @@ public function get()
 
             $cacheKey = 'igdb_cache.' . md5($this->endpoint . $this->getQuery());
 
-            if (!$this->cacheLifetime) {
+            if (is_int($this->cacheLifetime) && $this->cacheLifetime === 0) {
                 Cache::forget($cacheKey);
             }