Updates and build chain improvements

.eslintrc.cjs

@@ -0,0 +1,24 @@
+module.exports = {
+  root: true,
+  parser: "@typescript-eslint/parser",
+  extends: [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "prettier",
+  ],
+  plugins: ["svelte3", "@typescript-eslint"],
+  ignorePatterns: ["*.cjs"],
+  overrides: [{ files: ["*.svelte"], processor: "svelte3/svelte3" }],
+  settings: {
+    "svelte3/typescript": () => require("typescript"),
+  },
+  parserOptions: {
+    sourceType: "module",
+    ecmaVersion: 2020,
+  },
+  env: {
+    browser: true,
+    es2017: true,
+    node: true,
+  },
+};