Update MSRV compatibility pins in CI

Author: TheBlueMatt

ci/ci-tests.sh

@@ -29,6 +29,12 @@ function PIN_RELEASE_DEPS {
 	# Starting with version 1.0.21, the `ryu` crate has an MSRV of rustc 1.68
 	[ "$RUSTC_MINOR_VERSION" -lt 68 ] && cargo update -p ryu --precise "1.0.20" --verbose
 
+	# Starting with version 1.0.23, the `unicode-ident` crate has an MSRV of rustc 1.71
+	[ "$RUSTC_MINOR_VERSION" -lt 71 ] && cargo update -p unicode-ident --precise 1.0.22
+
+	# Starting with version 0.2.184, the `libc` crate has an MSRV of rustc 1.65
+	[ "$RUSTC_MINOR_VERSION" -lt 65 ] && cargo update -p libc --precise 0.2.183 --verbose
+
 	return 0 # Don't fail the script if our rustc is higher than the last check
 }