Force identical cxx-gen patch version for dev dependency

Author: dtolnay

Cargo.toml

@@ -34,7 +34,7 @@ cxxbridge-flags = { version = "=1.0.192", path = "flags", default-features = fal
 [dev-dependencies]
 cc = "1.0.101"
 cxx-build = { version = "1", path = "gen/build" }
-cxx-gen = { version = "0.7.192", path = "gen/lib" }
+cxx-gen = { version = "=0.7.192", path = "gen/lib" }
 cxx-test-suite = { version = "0", path = "tests/ffi" }
 indoc = "2"
 proc-macro2 = "1.0.95"