Add new files to gemspec

Author: headius

prism.gemspec

@@ -113,6 +113,9 @@ Gem::Specification.new do |spec|
     "lib/prism/dot_visitor.rb",
     "lib/prism/dsl.rb",
     "lib/prism/ffi.rb",
+    "lib/prism/ffi/common.rb",
+    "lib/prism/ffi/native_ffi.rb",
+    "lib/prism/ffi/wasm_ffi.rb",
     "lib/prism/inspect_visitor.rb",
     "lib/prism/lex_compat.rb",
     "lib/prism/mutation_compiler.rb",