Use u16 for import details line number

This should be enough!

Author: Peter554

rust/src/graph/graph_manipulation.rs

@@ -118,7 +118,7 @@ impl Graph {
         &mut self,
         importer: ModuleToken,
         imported: ModuleToken,
-        line_number: usize,
+        line_number: u16,
         line_contents: &str,
     ) {
         self.imports

rust/src/graph/mod.rs

@@ -131,7 +131,7 @@ impl<'a, T: Iterator<Item = &'a ModuleToken>> ModuleTokenIterator<'a> for T {}
 #[derive(Debug, Clone, PartialEq, Eq, Hash, new, Getters, CopyGetters)]
 pub struct ImportDetails {
     #[getset(get_copy = "pub")]
-    line_number: usize,
+    line_number: u16,
 
     #[getset(get_copy = "pub")]
     interned_line_contents: DefaultSymbol,

rust/src/lib.rs

@@ -111,7 +111,7 @@ impl GraphWrapper {
         &mut self,
         importer: &str,
         imported: &str,
-        line_number: Option<usize>,
+        line_number: Option<u16>,
         line_contents: Option<&str>,
     ) {
         let importer = self._graph.get_or_add_module(importer).token();
@@ -540,7 +540,7 @@ impl GraphWrapper {
 struct ImportDetails {
     importer: String,
     imported: String,
-    line_number: usize,
+    line_number: u16,
     line_contents: String,
 }