fix: Fix named return where it can panic (#9)

fix: Recover from double close (#8)

test: New test suite (#7)

docs: Update package docs

docs: Update README with correct links

docs: Tidy up README

docs: Update README.md

chore: Remove examples directory

feat!: Receive and Listen now return concrete types instead of refere…

…nces

chore: Change Listen's return type to be the same as Receive's