Description: update for serde_derive_internals > 0.26
 Between v 0.25 & 0.26 there was this commit:
 https://github.com/serde-rs/serde/commit/ed04824f1054a7eb65a7618cb5b844fa7065499b
 .
 It causes build failure:
 .
 error[E0277]: the trait bound `serde_derive_internals::attr::RenameRule: FromStr` is not satisfied
    --> src/attr.rs:198:42
     |
 198 |                 let rule = lit_val(lit)?.parse().map_err(|_| format_err!("Invalid RenameAll rule"))?;
     |                                          ^^^^^ the trait `FromStr` is not implemented for `serde_derive_internals::attr::RenameRule`
     |

--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,7 +36,7 @@
 version = "1.0"
 
 [dependencies.serde_derive_internals]
-version = "0.25"
+version = "0.29"
 
 [dependencies.syn]
 version = "1.0"
--- a/src/attr.rs
+++ b/src/attr.rs
@@ -195,7 +195,7 @@
 
             // #[enumeration(rename_all = "...")]
             Meta::NameValue(MetaNameValue { path, lit, .. }) if path.is_ident("rename_all") => {
-                let rule = lit_val(lit)?.parse().map_err(|_| format_err!("Invalid RenameAll rule"))?;
+                let rule = serde_derive_internals::attr::RenameRule::from_str(&lit_val(lit)?).map_err(|_| format_err!("Invalid RenameAll rule"))?;
                 Ok(Attr::RenameAll(RenameRule(rule)))
             }