use latest rust for non-windows, and upgrade tokio to 3.18 which fix a mpsc channel bug

.github/workflows/flutter-build.yml

@@ -11,7 +11,8 @@ on:
         default: "nightly"
 
 env:
-  RUST_VERSION: "1.75" # https://github.com/rustdesk/rustdesk/discussions/7503
+  WIN_RUST_VERSION: "1.75" # https://github.com/rustdesk/rustdesk/discussions/7503
+  RUST_VERSION: "1.78"
   CARGO_NDK_VERSION: "3.1.2"
   LLVM_VERSION: "15.0.6"
   FLUTTER_VERSION: "3.19.6"
@@ -84,7 +85,7 @@ jobs:
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@v1
         with:
-          toolchain: ${{ env.RUST_VERSION }}
+          toolchain: ${{ env.WIN_RUST_VERSION }}
           targets: ${{ matrix.job.target }}
           components: "rustfmt"
 

Cargo.lock

@@ -6359,9 +6359,9 @@ checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
 
 [[package]]
 name = "tokio"
-version = "1.37.0"
+version = "1.38.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1adbebffeca75fcfd058afa480fb6c0b81e165a0323f9c9d39c9697e37c46787"
+checksum = "ba4f4a02a7a80d6f274636f0aa95c7e383b912d41fe721a31f29e29698585a4a"
 dependencies = [
  "backtrace",
  "bytes",
@@ -6378,9 +6378,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-macros"
-version = "2.2.0"
+version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b8a1e28f2deaa14e508979454cb3a223b10b938b45af148bc0986de36f1923b"
+checksum = "5f5ae998a069d4b5aba8ee9dad856af7d520c3699e6159b185c2acd48155d39a"
 dependencies = [
  "proc-macro2 1.0.79",
  "quote 1.0.35",

libs/hbb_common/Cargo.toml

@@ -9,7 +9,7 @@ edition = "2018"
 [dependencies]
 flexi_logger = { version = "0.27", features = ["async"] }
 protobuf = { version = "3.4", features = ["with-bytes"] }
-tokio = { version = "1.37", features = ["full"] }
+tokio = { version = "1.38", features = ["full"] }
 tokio-util = { version = "0.7", features = ["full"] }
 futures = "0.3"
 bytes = { version = "1.6", features = ["serde"] }