chore: increment Inflector version
chore: increment Inflector version

Increment Inflector dependency version to 0.4.0. This fixes an issue where types
were naively snake-cased, resulting in erroneous names such as
`list_s_a_m_l_providers` instead of `list_saml_providers` from
`ListSAMLProviders`.

noggleboggle/rusoto,mattico/rusoto,DualSpark/rust-aws,indiv0/rusoto,mthjones/rusoto,DualSpark/rusoto,DualSpark/rust-aws,ford-prefect/rusoto,mattico/rusoto,SecurityInsanity/rusoto,mattico/rusoto,DualSpark/rusoto,ford-prefect/rusoto,rusoto/rusoto,rusoto/rusoto,DualSpark/rusoto,mthjones/rusoto,rusoto/rusoto,SecurityInsanity/rusoto,DualSpark/rust-aws,cmsd2/rusoto