Move TypeScript Node.js build to dist/node

Use a separate folder for the TypeScript build for Node.js in the dist
folder.  This makes each type of build consistently have its own output
folder instead of being interleaved with the Node.js build.

test/host/patch.js

@@ -5,7 +5,7 @@ const JSZip = require("jszip");
 const path = require("path");
 
 const lib = require("@clusterio/lib");
-const patch = require("@clusterio/host/dist/src/patch");
+const patch = require("@clusterio/host/dist/node/src/patch");
 
 
 describe("host/patch", function() {