Supported languages

Sunset detects languages from a filename extension, case-insensitively.

Language	ID	Extensions
Go	go	.go
JavaScript	javascript	.js, .jsx
TypeScript	typescript	.ts, .tsx
Python	python	.py

Unsupported extensions are not included in directory scans. Parsing a single file with an unsupported extension returns an unsupported-language error unless the public Go API is given WithLanguage.