Test cases

These file were copied from https://github.com/tc39/source-map-tests/blob/main/decoding/scopesgithub and modified to match changes in the source maps specification.

• empty-scopes-field: Empty original scopes field
• nil-scopes: Multiple null original scopes
• close-start-end-position-scopes: Scopes with very close start and end positions
• single-root-original-scope: A single global root original scope
• nested-scopes: Nested original scopes representing functions and blocks
• sibling-scopes: Multiple sibling top-level functions
• scope-variables: Scopes containing variable declarations
• multiple-root-original-scopes-with-nil: Multiple global root scopes with a null scope in between
• sibling-ranges: Multiple sibling root ranges
• nested-ranges: A root range with a nested function range
• range-values: A root range with a non-function range with bindings
• sub-range-values: A root range with sub-range bindings
• range-call-site: A function inlined into the root scope
• hidden-ranges: A function range corresponding to an original block scope