Add support for Lottie stickers

package-lock.json

@@ -19,6 +19,7 @@
         "matrix-appservice": "^2.0.0",
         "mixin-deep": "github:cloudrac3r/mixin-deep#v3.0.0",
         "node-fetch": "^2.6.7",
+        "pngjs": "^7.0.0",
         "prettier-bytes": "^1.0.4",
         "snowtransfer": "^0.8.0",
         "try-to-catch": "^3.0.1",
@@ -2281,6 +2282,14 @@
       "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-0.1.7.tgz",
       "integrity": "sha512-5DFkuoqlv1uYQKxy8omFBeJPQcdoE07Kv2sferDCrAq1ohOU+MSDswDIbnx3YAM60qIOnYa53wBhXW0EbMonrQ=="
     },
+    "node_modules/pngjs": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/pngjs/-/pngjs-7.0.0.tgz",
+      "integrity": "sha512-LKWqWJRhstyYo9pGvgor/ivk2w94eSjE3RGVuzLGlr3NmD8bf7RcYGze1mNdEHRP6TRP6rMuDHk5t44hnTRyow==",
+      "engines": {
+        "node": ">=14.19.0"
+      }
+    },
     "node_modules/prebuild-install": {
       "version": "7.1.1",
       "resolved": "https://registry.npmjs.org/prebuild-install/-/prebuild-install-7.1.1.tgz",