jsep: Tiny JavaScript Expression Parser

jsep is a lightweight and tiny JavaScript expression parser, currently at a stable version 1.4.0. It is designed specifically for parsing JavaScript expressions, akin to formulas in a spreadsheet, rather than full JavaScript statements or operations. This focus allows it to remain compact compared to more comprehensive parsers like Esprima, while producing an Abstract Syntax Tree (AST) output that is largely compatible with Esprima and SpiderMonkey's Parser API. The library features a flexible plugin architecture, enabling users to extend its capabilities with support for custom operators, literals, and more advanced syntax (e.g., ternary, object literals, async/await) via separate `@jsep-plugin/*` packages. Recent updates, including features like nullish coalescing and exponentiation, suggest an active, albeit not rapid, release cadence.