Added a missing dependency

README.md

@@ -3,13 +3,14 @@ niViz - Snowpack Visualization
 
 Setup
 -----
-Ensure that Node.js and make are available on your system:
+Ensure that Node.js and make are available on your system as well as bower (installed through npm):
 
     $ node -v
     v8.5.0
     $ make -v
     GNU Make 4.0
 
+Currently, it works properly with node 12.22.12 and npm 6.14.16. 
 Then run `make dep` to fetch and install all dependencies. At any
 time, you can run `make purge` to remove all downloaded dependencies
 completely.