Remove 'make-fetch-happen' dependency

As Fetch API is compatible with Node.js >= v18, the engine and dependencies are accordingly updated:

- engines:
```
"vscode": "^1.82.3",
"npm": ">=8.6.0",
"node": ">=18.0.0"
```
- devDependencies:
```
"@types/node": "^18.19.39",
...
"@types/vscode": "1.82.0",
```

Signed-off-by: Victor Rubezhny <vrubezhny@redhat.com>

.github/dependabot.yml

@@ -10,9 +10,6 @@ updates:
   schedule:
     interval: daily
   open-pull-requests-limit: 10
-  ignore:
-    - dependency-name: "make-fetch-happen"
-      versions: ["^13.x"]
   groups:
     typescript-eslint:
       patterns: