fix: Correctly returns releases from dotnet

lib/utils.bash

@@ -29,10 +29,40 @@ list_github_tags() {
     sed 's/^v//' # NOTE: You might want to adapt this sed to remove non-version strings from tags
 }
 
-list_all_versions() {
-  list_github_tags
+
+# taken from  asdf-dotnet-core plugin
+RELEASES_URI=https://raw.githubusercontent.com/dotnet/core/master/release-notes/releases-index.json
+FILE="releases.json"
+KEY="latest-sdk"
+
+download() {
+    curl -s $RELEASES_URI
+}
+
+match_key() {
+    grep -Eo '"'$1'": \".*\"'
+}
+
+sanitize() {
+    sed -e 's/"'$1'": \"//;s/\"//'
+}
+
+gnutac() {
+    if hash tac 2>/dev/null; then
+        tac "$@"
+    else
+        tail -r "$@"
+    fi
 }
 
+# end taken from  asdf-dotnet-core plugin
+
+list_all_versions() {
+  #TODO: remove this function call
+  #list | xargs -n1 echo_github_tags
+  echo $(download | match_key $FILE | sanitize $FILE | xargs curl -s | match_key $KEY | sanitize $KEY) | sed 's/ /\n/g'
+} 
+
 download_installer() { 
   local downloader
   downloader=$1