Merge pull request #597 from y-yagi/add_logger_as_dependency

Author: kateinoigakukun

ruby_wasm.gemspec

@@ -29,4 +29,6 @@ Gem::Specification.new do |spec|
   spec.executables = spec.files.grep(%r{\Aexe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
   spec.extensions = ["ext/ruby_wasm/Cargo.toml"]
+
+  spec.add_dependency "logger"
 end