fix(forge): flatten fails on top-level event declarations (foundry-rs#9892)

Author: grandizzy

Cargo.lock

@@ -187,7 +187,7 @@ foundry-linking = { path = "crates/linking" }
 
 # solc & compilation utilities
 foundry-block-explorers = { version = "0.11.0", default-features = false }
-foundry-compilers = { version = "0.13.2", default-features = false }
+foundry-compilers = { version = "0.13.3", default-features = false }
 foundry-fork-db = "0.11.0"
 solang-parser = "=0.3.3"
 solar-parse = { version = "=0.1.1", default-features = false }