Refresh dependencies, drop node-sass

`npm audit` revealed some vulnerabilities:

```

scss-tokenizer  <=0.4.2
Severity: high
Regular expression denial of service in scss-tokenizer - https://github.com/advisories/GHSA-7mwh-4pqv-wmr8
fix available via `npm audit fix --force`
Will install node-sass@4.5.3, which is a breaking change
node_modules/scss-tokenizer
  sass-graph  >=2.2.0
  Depends on vulnerable versions of scss-tokenizer
  node_modules/sass-graph
    node-sass  >=4.6.0
    Depends on vulnerable versions of sass-graph
    node_modules/node-sass

3 high severity vulnerabilities

```

We don't need node-sass, and sass-loader is just as happy using
another sass implementation. The preferred one is dart-sass which
is simply called sass in npm.

In the process, I also did an `npm update` just for good measure.

js/package.json

@@ -8,7 +8,7 @@
         "license-loader": "^0.5.0",
         "license-webpack-plugin": "^4.0.2",
         "purgecss": "^4.1.3",
-        "sass": "^1.50.0",
+        "sass": "^1.54.5",
         "sass-loader": "^12.6.0",
         "terser-webpack-plugin": "^5.3.1",
         "ts-loader": "^8.3.0",
@@ -21,7 +21,6 @@
         "bootstrap": "^5.1.3",
         "css-loader": "^5.2.6",
         "debounce": "^1.2.1",
-        "node-sass": "^7.0.1",
         "preact": "^10.7.1",
         "react-bootstrap": "^2.2.3",
         "style-loader": "^2.0.0",