fix dep type errors

[connectdotz]

v31.0.0 had 2 problem when trying to integrate:

1. typescript tsc compile problem

node_modules/jest-editor-support/build/parsers/index.d.ts:8:29 - error TS7016: Could not find a declaration file for module './parser_nodes'. '/Users/vsun/github/open-source/sandbox/vscode-jest-2023-01-13/node_modules/jest-editor-support/build/parsers/parser_nodes.js' implicitly has an 'any' type.

8 import { ParseResult } from './parser_nodes';
                              ~~~~~~~~~~~~~~~~


Found 1 error in node_modules/jest-editor-support/build/parsers/index.d.ts:8

This is fixed by modifying index.d.ts

2. type error when importing from jest-editor-support: TypeError: defineType is not a function
   This one is baffling. Some how jest-editor-support and its dependencies have problem finding the @babel/traverse. I had to lock the version down (in package.json) to make sure it can be located regardless of the client env. For future updates, it will be better to resolve the root cause; otherwise we have to continue this hack...

Also added a typescript flag "importsNotUsedAsValues": "error" so we can be more precise to import type vs. value. Fixed the import code accordingly.

Bump version to 31.0.1.