Support node 18+

[NateRadebaugh]

Description
Running npx source-map-explorer ./dist/main*.js files in node 18.x but works in node 16.x

Steps to reproduce

1. Go to a project you want to analyze
2. Run npx source-map-explorer in node 18.x
3. See error:
   • You must provide the URL of lib/mappings.wasm by calling SourceMapConsumer.initialize({ 'lib/mappings.wasm': ... }) before using SourceMapConsumer

Expected behavior
Explorer should work in both node 16 and newer 18.x current version

Environment

• OS: macOS Ventura 13.5.1
• source-map-explorer Version 2.5.3