Update list.txt

php: jmazzare
ruby: acole, kgrosh, arthurfc, adebaca, mthurmon, zlambert, Yueqin Yang
go:
rust:
scala:
clojure: dhampikian
swift: ncabral, mtaylor
dart: tfogdall
SQL: jlewis
MicroPython: jkniss
R: sbradbur
Galaxy: astout