use the Base version of func_for_method_checked

This package was noted to fail on the 1.2 branch of Julia. The usage of `func_for_method_checked` was changed in JuliaLang/julia#31025 to also take an `sparams` argument. The old usage was deprecated but the function `depwarn` is not available in `Core.Compiler`. Using the `Base` version of this function will show the deprecation message instead of hard errorring.

src/utils.jl

@@ -60,7 +60,7 @@ function my_code_typed(@nospecialize(f), @nospecialize(types=Tuple))
   world = ccall(:jl_get_world_counter, UInt, ())
   params = Core.Compiler.Params(world)
   for x in Core.Compiler._methods(f, types, -1, world)
-      meth = Core.Compiler.func_for_method_checked(x[3], types)
+      meth = Base.func_for_method_checked(x[3], types)
       (code, slottypes) = my_typeinf_code(meth, x[1], x[2], params)
       code === nothing && error("inference not successful")
       push!(asts, code => slottypes)
@@ -120,4 +120,4 @@ function hasreturnvalue(expr)
   (val == :nothing || val == nothing) && return expr
   @warn "@resumable function contains return statement with value!"
   expr
-end
+end