static: add polyfill for firefox for CSS

passbook/static/static/package-lock.json

@@ -340,6 +340,11 @@
             "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
             "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s="
         },
+        "construct-style-sheets-polyfill": {
+            "version": "2.4.3",
+            "resolved": "https://registry.npmjs.org/construct-style-sheets-polyfill/-/construct-style-sheets-polyfill-2.4.3.tgz",
+            "integrity": "sha512-ECo96zFPsdghrMJmJ0vomcHsqLOIYpudobcNCIPeMubyFzBcLCfljuY0oFA3DD7btiFqB0sZ+0szbsiE8I24VA=="
+        },
         "decode-uri-component": {
             "version": "0.2.0",
             "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.0.tgz",

passbook/static/static/package.json

@@ -12,6 +12,7 @@
         "@types/codemirror": "0.0.98",
         "chart.js": "^2.9.4",
         "codemirror": "^5.58.3",
+        "construct-style-sheets-polyfill": "^2.4.3",
         "lit-element": "^2.4.0",
         "lit-html": "^1.3.0",
         "rollup": "^2.33.3",

passbook/static/static/src/main.ts

@@ -1,3 +1,5 @@
+import 'construct-style-sheets-polyfill';
+
 import "./legacy.js";
 
 import "./elements/ActionButton";

passbook/static/static/tsconfig.json

@@ -6,7 +6,7 @@
         "forceConsistentCasingInFileNames": true,
         "experimentalDecorators": true,
         "sourceMap": true,
-        "target": "es2017",
+        "target": "esnext",
         "module": "es2015",
         "moduleResolution": "node",
         "lib": ["es2017", "dom", "dom.iterable"]