convert existing xrpl library into a lerna monorepo

packages/xrpl/tsconfig.json

@@ -0,0 +1,24 @@
+{
+  "compilerOptions": {
+    "pretty": true,
+    "target": "es6",
+    "module": "commonjs",
+    "moduleResolution": "node",
+    "outDir": "./dist/npm",
+
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true,
+
+    "strict": true,
+    "strictNullChecks": true,
+    "noImplicitAny": false,
+    "noUnusedLocals": true,
+    "removeComments": true,
+    "preserveConstEnums": false,
+    "esModuleInterop": true,
+    "suppressImplicitAnyIndexErrors": false,
+    "resolveJsonModule": true,
+    "preserveSymlinks": true
+  }
+}