update syn dependency

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "diesel-derive-enum"
-version = "2.0.1"
+version = "2.1.0"
 description = "Derive diesel boilerplate for using enums in databases"
 authors = ["Alex Whitney <[email protected]>"]
 repository = "https://github.com/adwhit/diesel-derive-enum"
@@ -12,7 +12,7 @@ edition = "2021"
 
 [dependencies]
 quote = "1"
-syn = "1"
+syn = "2"
 heck = "0.4.0"
 proc-macro2 = "1"
 

src/lib.rs

@@ -95,10 +95,14 @@ pub fn derive(input: TokenStream) -> TokenStream {
 
 fn val_from_attrs(attrs: &[Attribute], attrname: &str) -> Option<String> {
     for attr in attrs {
-        if attr.path.is_ident(attrname) {
-            match attr.parse_meta().ok()? {
+        if attr.path().is_ident(attrname) {
+            match &attr.meta {
                 Meta::NameValue(MetaNameValue {
-                    lit: Lit::Str(lit_str),
+                    value:
+                        Expr::Lit(ExprLit {
+                            lit: Lit::Str(lit_str),
+                            ..
+                        }),
                     ..
                 }) => return Some(lit_str.value()),
                 _ => panic!(

tests/Cargo.toml

@@ -5,7 +5,7 @@ authors = ["Alex Whitney <[email protected]>"]
 edition = "2021"
 
 [dependencies]
-diesel = "2.1"
+diesel = "2.1.0"
 diesel-derive-enum = { path = "./.." }
 
 [features]

tests_with_diesel_cli/Cargo.toml

@@ -5,7 +5,7 @@ authors = ["Alex Whitney <[email protected]>"]
 edition = "2021"
 
 [dependencies]
-diesel = { version = "2.1", features = ["postgres"] }
+diesel = { version = "2.1.0", features = ["postgres"] }
 diesel-derive-enum = { path = "./..", features = ["postgres"]}
 
 [features]