Bump Wasmtime to 2.0.0 (#4874)

This commit replaces #4869 and represents the actual version bump that
should have happened had I remembered to bump the in-tree version of
Wasmtime to 1.0.0 prior to the branch-cut date. Alas!

crates/cli-flags/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "wasmtime-cli-flags"
-version = "0.41.0"
+version = "2.0.0"
 authors = ["The Wasmtime Project Developers"]
 description = "Exposes common CLI flags used for running Wasmtime"
 license = "Apache-2.0 WITH LLVM-exception"
@@ -14,7 +14,7 @@ clap = { version = "3.2.0", features = ["color", "suggestions", "derive"] }
 file-per-thread-logger = "0.1.1"
 pretty_env_logger = "0.4.0"
 rayon = "1.5.0"
-wasmtime = { path = "../wasmtime", version = "0.41.0", default-features = false }
+wasmtime = { path = "../wasmtime", version = "2.0.0", default-features = false }
 
 [features]
 default = [