docs(changelog): Bump to v1.3.5

Author: jdalton

CHANGELOG.md

@@ -12,9 +12,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added `createEnvProxy()` utility function to `env` module for Windows-compatible environment variable access
   - Provides case-insensitive environment variable access (e.g., PATH, Path, path all work)
   - Smart priority system: overrides > exact match > case-insensitive fallback
-  - Full Proxy implementation with proper handlers for get, set, has, deleteProperty, ownKeys
+  - Full Proxy implementation with proper handlers for get, set, has, ownKeys, getOwnPropertyDescriptor
   - Opt-in helper for users who need Windows env var compatibility
   - Well-documented with usage examples and performance notes
+- Added `findCaseInsensitiveEnvKey()` utility function to `env` module
+  - Searches for environment variable keys using case-insensitive matching
+  - Optimized with length fast path to minimize expensive `toUpperCase()` calls
+  - Useful for cross-platform env var access where case may vary (e.g., PATH vs Path vs path)
+- Added comprehensive test suite for `env` module with 71 tests
+  - Covers `envAsBoolean()`, `envAsNumber()`, `envAsString()` conversion utilities
+  - Tests `createEnvProxy()` with Windows environment variables and edge cases
+  - Validates `findCaseInsensitiveEnvKey()` optimization and behavior
 
 ### Fixed