update content type logic to check if header includes image/gif rather than strictly checking for image/gif (#14)

update package.json to match react-gifs/tools name
remove yarn.lock
Co-authored-by: bluematter <[email protected]>

Author: bluematter

src/parse-generate.js

@@ -15,7 +15,7 @@ const validateAndFix = (gif) => {
 export const parse = (src, { signal }) =>
   fetch(src, { signal })
     .then((resp) => {
-      if (resp.headers.get("Content-Type") !== "image/gif")
+      if (!resp.headers.get("Content-Type").includes("image/gif"))
         throw Error(
           `Wrong content type: "${resp.headers.get("Content-Type")}"`
         );