Merge pull request wasmerio#166 from wasmerio/update-wasmer-stable-1.0.0

chore: Bump to wasmer 1.0.0

Merge pull request wasmerio#154 from wasmerio/prepare-1.0.0-beta1

chore: Update the changelog

doc(changelog) Prepare the 0.3.1.

doc(readme) `Append` is deprecated in favor of `AppendFunction`.

chore(release) Bump version.

chore(release) Bump version.