Fix error when `maybe_expr` enabled (#73)

* Try reproduce feature enabled bug

* fixup! Try reproduce feature enabled bug

* fixup! fixup! Try reproduce feature enabled bug

* fixup! fixup! fixup! Try reproduce feature enabled bug

* fixup! fixup! fixup! fixup! Try reproduce feature enabled bug

* Fix error not raising

* fixup! fixup! fixup! fixup! fixup! Try reproduce feature enabled bug

* Remove support for OTP-24

* Revert "Remove support for OTP-24"

This reverts commit 1fcfb64.

* Preprocess doc source

* Bump to 0.13.1

Bump to v0.13.0 (#72)

Bump to v0.12.0 (#70)

Bump to v0.11.0 (#66)

Bump to v0.10.2 (#62)

Bump to v0.10.1 (#55)

Bump to v0.10.0 (#53)

* Ignore doc folder

* Bump to v0.10.0

Bump to v0.9.3 (#43)

* Tweak README.md

* Update version in src file

* Publish version in hex.pm

Merge pull request #39 from williamthome/chore/bump-version

Bump to v0.9.2

Merge pull request #37 from williamthome/chore/bump-version

Bump to v0.9.1