allow stdlibs to change in the resolve if manifest came from a similar julia version

Author: IanButterworth

src/Operations.jl

@@ -337,7 +337,17 @@ function resolve_versions!(env::EnvCache, registries::Vector{Registry.RegistryIn
     for pkg in pkgs
         names[pkg.uuid] = pkg.name
     end
-    reqs = Resolve.Requires(pkg.uuid => VersionSpec(pkg.version) for pkg in pkgs)
+
+    pkgs_to_require = if env.manifest.julia_version.major == VERSION.major && env.manifest.julia_version.minor == VERSION.minor
+        # if the manifest was previously resolved by the same major-minor julia version, don't require stdlib versions
+        # to remain the same. This allows manifests that were generated on nightly julia versions, where stdlibs may change version
+        # to be updated
+        filter(pkg -> !is_stdlib(pkg.uuid), pkgs)
+    else
+        pkgs
+    end
+
+    reqs = Resolve.Requires(pkg.uuid => VersionSpec(pkg.version) for pkg in pkgs_to_require)
     graph, compat_map = deps_graph(env, registries, names, reqs, fixed, julia_version)
     Resolve.simplify_graph!(graph)
     vers = Resolve.resolve(graph)