v1.0.0-beta.5

Many thanks to @NiklasPor and @ssalbdivad for contributing to this release.

• Fix output type of optional, optionalAsync, nullable, nullableAsync, nullish and nullishAsync schema
• Fix implementation of nonOptional, nonOptionalAsync, nonNullable, nonNullableAsync, nonNullish and nonNullishAsync schema in edge cases (issue #909)