fix(nep330): return back fallback vals of CARGO_PKG_REPOSITORY and …

…`CARGO_PKG_VERSION`

To avoid problems on older <0.7.0 cargo-near versions

near-sdk-macros/src/core_impl/contract_metadata/mod.rs

@@ -56,13 +56,17 @@ struct Standard {
 impl ContractMetadata {
     fn populate(mut self) -> Self {
         if self.link.is_none() {
-            let field_val = std::env::var("NEP330_LINK").unwrap_or(String::from(""));
+            let field_val = std::env::var("NEP330_LINK")
+                .or(std::env::var("CARGO_PKG_REPOSITORY"))
+                .unwrap_or(String::from(""));
             if !field_val.is_empty() {
                 self.link = Some(field_val);
             }
         }
         if self.version.is_none() {
-            let field_val = std::env::var("NEP330_VERSION").unwrap_or(String::from(""));
+            let field_val = std::env::var("NEP330_VERSION")
+                .or(std::env::var("CARGO_PKG_VERSION"))
+                .unwrap_or(String::from(""));
             if !field_val.is_empty() {
                 self.version = Some(field_val);
             }