[CI] Fix the CI job.

A number of dependencies no longer build under rust 1.65. I
pinned 'em in order to preserve the minimum supported version.

  - toml
  - toml-edit
  - cargo-deb
  - anstyle to 1.0.2

.github/workflows/ci.yml

@@ -123,7 +123,7 @@ jobs:
     - name: Install additional Rust tooling
       shell: bash
       run: |
-          cargo install --verbose cargo-deb
+          cargo install --verbose --version=1.44.0 --locked cargo-deb
 
     - name: Configure mpdpopm
       shell: bash

mpdpopm/Cargo.toml.in

@@ -16,6 +16,7 @@ exclude = ["Cargo.toml.in", "Cargo.toml.orig", "Makefile", "Makefile.in", "Makef
 lalrpop = { version = "0.20", features = ["lexer"] }
 
 [dependencies]
+anstyle = "=1.0.2" # Pin to preserve the ability to build with rust 1.65
 async-trait = "0.1.31"
 backtrace = "0.3.46"
 boolinator = "2.4.0"
@@ -34,6 +35,8 @@ pin-project = "1.0.8"
 regex = "1.3.6"
 serde = { version = "1.0", features = ["derive"] }
 serde-lexpr = "0.1.1"
+toml = "=0.7.6" # Pin to preserve the ability to build with rust 1.65
+toml_edit = "=0.19.12" # Pin to preserve the ability to build with rust 1.65
 tokio = { version = "1.15.0", features = ["io-util", "macros", "net", "process", "rt-multi-thread", "signal", "time"] }
 
 [package.metadata.deb]