Relax openapiv3 requirement from =1.0.0 to 1.0 (#26)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Dominic <[email protected]>

Author: dependabot[bot]

Cargo.toml

@@ -19,7 +19,7 @@ include = ["src/**/*", "LICENSE", "crates-io.md"]
 [dependencies]
 indexmap = "1.7"
 openapi_type_derive = { path = "./derive", version = "0.3.0" }
-openapiv3 = "=1.0.0"
+openapiv3 = "1.0"
 serde_json = "1.0"
 
 # optional dependencies / features