Remove tokio version bounds

This is fine since tokio-rs/tokio#6610 is
resolved via becheran/ntest#28 which has now
been released in ntest 0.9.3
Also bumps the itertools + base64 versions, since they are trivial upgrades

examples/Cargo.toml

@@ -19,8 +19,7 @@ scylla = { path = "../scylla", features = [
     "num-bigint-04",
     "bigdecimal-04",
 ] }
-# FIXME: Remove <1.38 once https://github.com/tokio-rs/tokio/issues/6610 is fixed
-tokio = { version = ">=1.34, <1.38", features = ["full"] }
+tokio = { version = "1.34", features = ["full"] }
 tracing = { version = "0.1.25", features = ["log"] }
 tracing-subscriber = { version = "0.3.14", features = ["env-filter"] }
 chrono = { version = "0.4", default-features = false }

scylla-cql/Cargo.toml

@@ -13,8 +13,7 @@ license = "MIT OR Apache-2.0"
 scylla-macros = { version = "0.5.0", path = "../scylla-macros" }
 byteorder = "1.3.4"
 bytes = "1.0.1"
-# FIXME: Remove <1.38 once https://github.com/tokio-rs/tokio/issues/6610 is fixed
-tokio = { version = ">=1.34, <1.38", features = ["io-util", "time"] }
+tokio = { version = "1.34", features = ["io-util", "time"] }
 secrecy-08 = { package = "secrecy", version = "0.8", optional = true }
 snap = "1.0"
 uuid = "1.0"

scylla-proxy/Cargo.toml

@@ -17,8 +17,7 @@ scylla-cql = { version = "0.2.0", path = "../scylla-cql" }
 byteorder = "1.3.4"
 bytes = "1.2.0"
 futures = "0.3.6"
-# FIXME: Remove <1.38 once https://github.com/tokio-rs/tokio/issues/6610 is fixed
-tokio = { version = ">=1.34, <1.38", features = [
+tokio = { version = "1.34", features = [
     "net",
     "time",
     "io-util",
@@ -39,8 +38,7 @@ rand = "0.8.5"
 assert_matches = "1.5.0"
 ntest = "0.9.0"
 tracing-subscriber = { version = "0.3.14", features = ["env-filter"] }
-# FIXME: Remove <1.38 once https://github.com/tokio-rs/tokio/issues/6610 is fixed
-tokio = { version = ">=1.34, <1.38", features = ["signal"] }
+tokio = { version = "1.34", features = ["signal"] }
 
 [lints.rust]
 unreachable_pub = "warn"

scylla/Cargo.toml

@@ -47,8 +47,7 @@ bytes = "1.0.1"
 futures = "0.3.6"
 hashbrown = "0.14"
 histogram = "0.6.9"
-# FIXME: Remove <1.38 once https://github.com/tokio-rs/tokio/issues/6610 is fixed
-tokio = { version = ">=1.34, <1.38", features = [
+tokio = { version = "1.34", features = [
     "net",
     "time",
     "io-util",
@@ -85,8 +84,7 @@ bigdecimal-04 = { package = "bigdecimal", version = "0.4" }
 scylla-proxy = { version = "0.0.3", path = "../scylla-proxy" }
 ntest = "0.9.0"
 criterion = "0.4"                                              # Note: v0.5 needs at least rust 1.70.0
-# FIXME: Remove <1.38 once https://github.com/tokio-rs/tokio/issues/6610 is fixed
-tokio = { version = ">=1.34, <1.38", features = ["test-util"] }
+tokio = { version = "1.34", features = ["test-util"] }
 tracing-subscriber = { version = "0.3.14", features = ["env-filter"] }
 assert_matches = "1.5.0"
 rand_chacha = "0.3.1"