v1 checkpoint

This commit is the initial checkpoint for a functioning converter with
all tests passing.

tsconfig.json

@@ -1,12 +1,10 @@
 {
   "compilerOptions": {
     "strict": true,
+    "declaration": true,
     "target": "esnext",
-    "module": "esnext",
-    "esModuleInterop": true,
-    "types": ["node"],
-    "forceConsistentCasingInFileNames": true,
-    "outDir": "dist/lib",
+    "module": "commonjs",
+    "outDir": "./dist",
     "rootDir": "src/ts"
   },
   "include": ["src/ts/**/*.ts"],