update npm install and contributing.md

Author: aspeddro

CONTRIBUTING.md

@@ -76,7 +76,7 @@ opam install ocaml-lsp-server
 
   <img width="359" alt="image" src="https://user-images.githubusercontent.com/1909539/97448639-19db0800-18ee-11eb-875a-d17cd1b141d1.png">
 
-- For the native analysis binary tests: `make test`.
+- For the native analysis and tools binary tests: `make test`.
 
 ## Change the Grammar
 

package.json

@@ -218,7 +218,7 @@
 		"vscode:prepublish": "npm run clean && npm run compile",
 		"compile": "tsc -b",
 		"watch": "tsc -b -w",
-		"postinstall": "cd server && npm i && cd ../client && npm i && cd ../analysis/tests && npm i && cd ../reanalyze/examples/deadcode && npm i && cd ../termination && npm i"
+		"postinstall": "cd server && npm i && cd ../client && npm i && cd ../tools && npm i && cd ../tools/tests && npm i && cd ../../analysis/tests && npm i && cd ../reanalyze/examples/deadcode && npm i && cd ../termination && npm i"
 	},
 	"devDependencies": {
 		"@types/node": "^14.14.41",