fix: specify global types

Author: olehmisar

README.md

@@ -9,7 +9,7 @@ Put this into your Nargo.toml.
 If you are using Noir:
 
 ```toml
-nodash = { git = "https://github.com/olehmisar/nodash/", tag = "v0.39.0" }
+nodash = { git = "https://github.com/olehmisar/nodash/", tag = "v0.39.2" }
 ```
 
 The version of nodash matches the version of Noir. The patch version may be different if a bugfix or a new feature is added for the same version of Noir. E.g., nodash@v0.39.0 and nodash@v0.39.1 are compatible with noir@v0.39.0.

src/solidity.nr

@@ -1,4 +1,4 @@
-global SELECTOR_LENGTH = 4;
+global SELECTOR_LENGTH: u32 = 4;
 
 pub fn encode_with_selector<let N: u32>(
     selector: u32,

src/string.nr

@@ -10,7 +10,7 @@ pub fn to_hex_string_bytes(value: Field) -> [u8; 64] {
     result
 }
 
-global U64_STR_LEN = 20;
+global U64_STR_LEN: u32 = 20;
 pub fn str_to_u64(arr: impl Into<[u8; U64_STR_LEN]>) -> u64 {
     let arr = arr.into();