Update pressbooks/mix

composer.lock

@@ -210,16 +210,16 @@
         },
         {
             "name": "pressbooks/mix",
-            "version": "2.1.2",
+            "version": "2.1.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/pressbooks/mix.git",
-                "reference": "c0c4ced76872e7521edad0113993a1c7e921338a"
+                "reference": "25aaa7691cf78917ff2b037260596cdcf7a8c8c7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/pressbooks/mix/zipball/c0c4ced76872e7521edad0113993a1c7e921338a",
-                "reference": "c0c4ced76872e7521edad0113993a1c7e921338a",
+                "url": "https://api.github.com/repos/pressbooks/mix/zipball/25aaa7691cf78917ff2b037260596cdcf7a8c8c7",
+                "reference": "25aaa7691cf78917ff2b037260596cdcf7a8c8c7",
                 "shasum": ""
             },
             "require-dev": {
@@ -228,7 +228,7 @@
             "type": "library",
             "autoload": {
                 "psr-4": {
-                    "PressbooksMix\\": "inc/class-assets.php"
+                    "PressbooksMix\\": "inc/"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -243,9 +243,9 @@
             ],
             "support": {
                 "issues": "https://github.com/pressbooks/mix/issues",
-                "source": "https://github.com/pressbooks/mix/tree/2.1.2"
+                "source": "https://github.com/pressbooks/mix/tree/2.1.3"
             },
-            "time": "2022-05-03T18:48:43+00:00"
+            "time": "2022-05-03T18:58:59+00:00"
         },
         {
             "name": "spatie/color",