swc_ecma_minifier:
- `conditionals`: Preserve a conditional expression if test is not resolved.
- `unsafe_arrows`: Optimize an anonymous function expression as an arrow expression.
- `unsafe_methods`: Optimize a method property where the only statement is return to an arrow expression.
swc_ecma_minifier:
- `pure`: Add an optional list of bindings.
- `pure`: Drop identifier only if we have the complete list of bindings.
- `pure`: Allow using `GLOBALS`.
- `pure`: Drop some pure member expressions.
- Move identifier dropping logic from the stateful optimizer to the pure optimizer.
- `pure`: Drop more references to global declarations.
