Minor update to JavaScriptParser to generate correct AST elements.

[traceyyoshima]

Changes:

• JavaScriptParser creates test files with .ts extension instead of .js
• Updated ts.config to match the script target in the runtime index.ts increateScanner()
• Updated tests to fail when ParserErrors are detected in the source.

fixes #56

[zieka]

I imagine this is fine for now; is the plan:

graph LR
    A[.ts file] -->|ts AST via tsc| B((ts AST))
    B -->|map to LST| C((LST))
    C -->|.ts file via openrewrite printer| D[.ts file]

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[traceyyoshima]

Yes, the supported extensions are set to:

• .js, .jsx, .mjs, .cjs
• .ts, .tsx, .mts, .cts

There are a few configurations I am unsure of:

1. Should we set the ScriptTarget based on the project? ES2000, ES2020, ESNEXT, etc.
2. Is it safe to set the ScriptKind to the TS equivalent of a JS file (JS -> TS, JSX -> TSX), or should we let the extension set the behavior in the compiler?

[traceyyoshima]

I don't know what the ScriptTarget settings affect in the compiler. I changed it so that the Scanner would be set to the same version of the lib and target in the compiler options.