Drop explicit/pinned libloading dependency (#913)

Unlike clap and criterion, which are pinned dev-dependencies, libloading
shows up in downstream dependency graphs. As such, pinning libloading
to 0.8.8 in these crates holds back its use in all downstream projects,
the vast majority of which will have a newer MSRV. As such, pinning is
not a great solution for the problem at hand. Instead, adjust CI workflows
to make sure an older libloading is used.

Author: djc

.github/workflows/integration.yml

@@ -344,6 +344,7 @@ jobs:
       - name: Update dependencies
         run: |
           cargo +1.70.0 update
+          cargo +1.70.0 update -p libloading --precise 0.8.8
           cargo +1.70.0 tree
 
       - name: Verify msrv

Cargo.toml

@@ -33,9 +33,6 @@ untrusted = "0.7.1"
 zeroize = "1.8.1"
 toml_edit = "0.23.0"
 
-# libloading v0.8.9 has MSRV of 1.71.0
-libloading = "=0.8.8"
-
 [profile.bench]
 lto = true
 

aws-lc-fips-sys/Cargo.toml

@@ -70,8 +70,6 @@ dunce.workspace = true
 fs_extra.workspace = true
 cc.workspace = true
 regex.workspace = true
-# libloading v0.8.9 has MSRV of 1.71.0
-libloading.workspace = true
 
 [target.'cfg(all(any(target_arch = "x86_64", target_arch = "aarch64"), any(target_os = "linux", target_os = "macos"), any(target_env = "gnu", target_env = "musl", target_env = "")))'.build-dependencies]
 bindgen = { workspace = true, optional = true }
@@ -84,6 +82,3 @@ regex.workspace = true
 
 [package.metadata.aws-lc-fips-sys]
 commit-hash = "fcd86b8478a66721b3356e1fe85a0d1e31a4e834"
-
-[package.metadata.cargo-udeps.ignore]
-build = ["libloading"]

aws-lc-sys/Cargo.toml

@@ -69,8 +69,6 @@ cmake.workspace = true
 dunce.workspace = true
 fs_extra.workspace = true
 cc = { workspace = true, features = ["parallel"] }
-# libloading v0.8.9 has MSRV of 1.71.0
-libloading.workspace = true
 
 [target.'cfg(any(all(any(target_arch="x86_64",target_arch="aarch64"),any(target_os="linux",target_os="macos",target_os="windows"),any(target_env="gnu",target_env="musl",target_env="msvc",target_env="")),all(target_arch="x86",target_os="windows",target_env="msvc"),all(target_arch="x86",target_os="linux",target_env="gnu")))'.build-dependencies]
 bindgen = { workspace = true, optional = true }
@@ -80,6 +78,3 @@ bindgen.workspace = true
 
 [package.metadata.aws-lc-sys]
 commit-hash = "8ca0b29b141bb8c7eae06ef324e2091d5648d819"
-
-[package.metadata.cargo-udeps.ignore]
-build = ["libloading"]