Bump shadow-cljs to 2.12.7

* Bump shadow-cljs to 2.12.7 for source-map fixes and cljs compatiblity

Author: kommen

deps.edn

@@ -2,7 +2,7 @@
         org.clojure/clojurescript {:mvn/version "1.10.844"}}
  :aliases
  {:dev {:extra-paths ["test"]
-        :extra-deps {thheller/shadow-cljs {:mvn/version "2.11.11"}}}
+        :extra-deps {thheller/shadow-cljs {:mvn/version "2.12.7"}}}
   :demo {:extra-deps {borkdude/sci {:mvn/version "0.2.0"}
                       reagent/reagent {:mvn/version "1.0.0"}}
          :extra-paths ["demo/src"]}}}