add basic repl

repl/tsconfig.json

@@ -0,0 +1,28 @@
+{
+  "include": ["src", "types"],
+  "compilerOptions": {
+    "allowJs": true,
+    "module": "esnext",
+    "target": "esnext",
+    "moduleResolution": "node",
+    "jsx": "preserve",
+    "baseUrl": "./",
+    /* paths - import rewriting/resolving */
+    "paths": {
+      // If you configured any Snowpack aliases, add them here.
+      // Add this line to get types for streaming imports (packageOptions.source="remote"):
+      //     "*": [".snowpack/types/*"]
+      // More info: https://www.snowpack.dev/guides/streaming-imports
+    },
+    /* noEmit - Snowpack builds (emits) files, not tsc. */
+    "noEmit": true,
+    /* Additional Options */
+    "strict": true,
+    "skipLibCheck": true,
+    "types": ["mocha", "snowpack-env"],
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true,
+    "allowSyntheticDefaultImports": true,
+    "importsNotUsedAsValues": "error"
+  }
+}