resolve problems from deps upgrade

- downgrade reqwest to 0.11.27
  - fixes problems with missmatched transitive dependencies between it and warp, mainly http
- replace deprecated ripemd160 with ripemd (as specified in the formers readme)
- indexmap: replace deprecated remove with functionally identical swap_remove

src/ffi.rs

@@ -150,7 +150,7 @@ impl ForeignFunctionTable {
                     FunctionImpl {
                         cif,
                         args,
-                        code_ptr: CodePtr(code_ptr.into_raw().into_raw() as *mut _),
+                        code_ptr: CodePtr(code_ptr.into_raw().as_raw_ptr()),
                         return_struct_name,
                     },
                 );