Two improvements to the development workflow (#270)

* Configure rust-analyzer to target wasm32-unknown-unknown

* Watch changes to core rust files

.vscode/settings.json

@@ -12,6 +12,7 @@
 		"editor.defaultFormatter": "dbaeumer.vscode-eslint",
 	},
 	"rust-analyzer.experimental.procAttrMacros": true,
+	"rust-analyzer.cargo.target": "wasm32-unknown-unknown",
 	"files.eol": "\n",
 	"html.format.wrapLineLength": 200,
 	"eslint.format.enable": true,
@@ -23,4 +24,4 @@
 		"typescript",
 	],
 	"vetur.format.enable": false,
-}
+}