raise MSRV to 1.84

It should still build with a rustc as far back as 1.75.0, but the lack of a MSRV-aware resolver means an increasinly large number of dependencies have to be manually pinned to old versions, and figuring it out is a huge pain.

Author: wfraser

.github/workflows/cargo-test.yml

@@ -39,16 +39,10 @@ jobs:
         run: if [[ ! -z `git status --porcelain=v1` ]]; then echo "::error::Workspace is dirty after running generator. Did you remember to check in the generated files?"; exit 1; fi
 
       - name: Install MSRV toolchain
-        run: rustup install 1.75.0 --profile minimal
-
-      # remove this once our MSRV is >= 1.84, which has the MSRV-aware resolver
-      - name: fix deps for old rustc
-        run: |
-          rustup run 1.75.0 cargo update litemap --precise 0.7.4
-          rustup run 1.75.0 cargo update zerofrom --precise 0.1.5
+        run: rustup install 1.84.0 --profile minimal
 
       - name: Run cargo test
-        run: rustup run 1.75.0 cargo test --all-features
+        run: rustup run 1.84.0 cargo test --all-features
 
       - name: Run clippy
         run: rustup run nightly cargo clippy --all-targets --all-features -- --deny warnings

Cargo.toml

@@ -12,8 +12,8 @@ readme = "README.md"
 
 [package.metadata]
 # Keep this at least 1 year old.
-# 1.75 is required for "-> impl Trait"
-msrv = "1.75.0" # Dec 28, 2023
+# 1.84 is required for the MSRV-aware dependency resolver
+msrv = "1.84.0" # Jan 9, 2025
 
 [dependencies]
 async-lock = "3.3.0"

RELEASE_NOTES.md

@@ -1,3 +1,7 @@
+# unreleased (v0.19.2)
+xxxx-yy-zz
+* MSRV raised to 1.84.0
+
 # v0.19.1
 2025-03-14
 * ureq (default non-async HTTP client impl) updated from major version 2 to 3.

clippy.toml

@@ -2,4 +2,4 @@
 doc-valid-idents = ["OAuth2"]
 
 # Don't warn about things that can't be used in this version.
-msrv = "1.75.0"
+msrv = "1.84.0"