Update dependencies to reflect minimal versions (#4272)

Based on testing locally with `rm -f Cargo.lock && cargo +nightly check --tests --all -Z minimal-versions`

Cargo.toml

@@ -18,7 +18,7 @@ rust-version = "1.63"
 cfg-if = "1.0"
 libc = "0.2.62"
 memoffset = "0.9"
-once_cell = "1"
+once_cell = "1.13.0"
 
 # ffi bindings to the python interpreter, split into a separate crate so they can be used independently
 pyo3-ffi = { path = "pyo3-ffi", version = "=0.22.0-dev" }

pyo3-ffi-check/macro/Cargo.toml

@@ -10,6 +10,6 @@ proc-macro = true
 [dependencies]
 glob = "0.3"
 quote = "1"
-proc-macro2 = "1"
+proc-macro2 = "1.0.60"
 scraper = "0.17"
 pyo3-build-config = { path = "../../pyo3-build-config" }

pyo3-macros-backend/Cargo.toml

@@ -15,7 +15,7 @@ edition = "2021"
 # See https://github.com/PyO3/pyo3/pull/810 for more.
 [dependencies]
 heck = "0.5"
-proc-macro2 = { version = "1", default-features = false }
+proc-macro2 = { version = "1.0.60", default-features = false }
 pyo3-build-config = { path = "../pyo3-build-config", version = "=0.22.0-dev", features = ["resolve-config"] }
 quote = { version = "1", default-features = false }
 

pyo3-macros/Cargo.toml

@@ -19,7 +19,7 @@ experimental-async = ["pyo3-macros-backend/experimental-async"]
 gil-refs = ["pyo3-macros-backend/gil-refs"]
 
 [dependencies]
-proc-macro2 = { version = "1", default-features = false }
+proc-macro2 = { version = "1.0.60", default-features = false }
 quote = "1"
 syn = { version = "2", features = ["full", "extra-traits"] }
 pyo3-macros-backend = { path = "../pyo3-macros-backend", version = "=0.22.0-dev" }