Upgrade systemjs to 6.3.1 (from 6.2.6)

Author: bdukes

package.json

@@ -72,7 +72,7 @@
     "select2": "4.0.13",
     "spectrum-colorpicker": "1.8.0",
     "swiper": "5.3.7",
-    "systemjs": "6.2.6",
+    "systemjs": "6.3.1",
     "tableexport": "5.2.0",
     "tinymce": "5.2.1",
     "underscore": "1.10.2",

yarn.lock

@@ -5845,10 +5845,10 @@ swiper@5.3.7:
     dom7 "^2.1.3"
     ssr-window "^1.0.1"
 
-systemjs@6.2.6:
-  version "6.2.6"
-  resolved "https://registry.yarnpkg.com/systemjs/-/systemjs-6.2.6.tgz#9e529d6eb4a17929d2052ca0e4699ad5fb0eeed1"
-  integrity sha512-cIGKuf8PwDPsiuC+op7tiyvQTWLDzzXYSx9aYmSrHiz6mVal6VT7uAS0gTEBs5WIWc03RqhvnNbNgodaauBsbg==
+systemjs@6.3.1:
+  version "6.3.1"
+  resolved "https://registry.yarnpkg.com/systemjs/-/systemjs-6.3.1.tgz#661adf60f257c1f65b8075fd5b034c0c69b306f4"
+  integrity sha512-pYAQxEK2a3Xj6cRVXrXgogSfKc3oFTzEWejK8KfHcZxwT31yT2xL43WXjUNcjOk5P048Z1zLRIlfrB3Mq4W+PQ==
 
 tableexport@5.2.0:
   version "5.2.0"