fix(docs): bump version of problematic crates

As noted here, rust-lang/rust#113152, the crate
`proc-macro2` requires a version > 1.0.60.

This issue has been fixed in `zrpc-macros` 0.7.0-alpha.2 and this commit
relaxes the constraint on `proc-macro2` in `zenoh-flow-derive`.

Signed-off-by: Julien Loudet <julien.loudet@zettascale.tech>

Cargo.toml

@@ -42,7 +42,7 @@ zenoh-plugin-trait = { version = "0.7.2-rc", default-features = false }
 zenoh-sync = { version = "0.7.2-rc" }
 zenoh-util = { version = "0.7.2-rc" }
 zrpc = { version = "0.7.0-alpha.1" }
-zrpc-macros = { version = "0.7.0-alpha.1" }
+zrpc-macros = { version = "0.7.0-alpha.2" }
 
 [profile.dev]
 debug = true

rust-toolchain

@@ -1 +1 @@
-1.70.0
+1.70

zenoh-flow-derive/Cargo.toml

@@ -32,11 +32,11 @@ async-std = { version = "=1.12.0", features = ["attributes"] }
 darling = "0.14"
 futures = "0.3.5"
 proc-macro-error = "1.0.4"
-proc-macro2 = "1.0.46"
-quote = "1.0.2"
+proc-macro2 = "1.0"
+quote = "1.0"
 serde = { version = "1.0.55", features = ["derive"] }
 serde_derive = "1.0.55"
-syn = { version = "1.0.11", features = ["full"] }
+syn = { version = "1.0", features = ["full"] }
 syn-serde = { version = "0.2", features = ["json"] }
 
 [dev-dependencies]