Set package type to be library again

  this was lost in version swap from v3-v4

Author: pattonwebz

CHANGELOG.md

@@ -2,6 +2,7 @@
 ## [4.0.2]
 - Fix dropdown opener having empty string for href value.
 - More accurate regex matching of icon and linkmod classnames.
+- Changed composer package type to `library` from `wordpress-plugin` again.
 
 ## [4.0.1]
 - Fix untranslated string in fallback (this was lost in transition between v3 and v4, fixed again).

composer.json

@@ -1,7 +1,7 @@
 {
     "name": "wp-bootstrap/wp-bootstrap-navwalker",
     "description": "A custom WordPress nav walker class to fully implement the Bootstrap 4 navigation style in a custom theme using the WordPress built in menu manager.",
-    "type": "wordpress-plugin",
+    "type": "library",
     "license": "GPL-3.0+",
     "authors": [
         {
@@ -16,6 +16,9 @@
         "issues": "https://github.com/wp-bootstrap/wp-bootstrap-navwalker/issues/",
         "source": "https://github.com/wp-bootstrap/wp-bootstrap-navwalker/"
     },
+	"autoload": {
+		"files": ["class-wp-bootstrap-navwalker.php"]
+	},
     "require": {
       "composer/installers": "~1.0"
     },