Add explicit lifetimes to borrowed return types (#411)

src/attrs.rs

@@ -88,7 +88,7 @@ impl FamilyOwned {
         }
     }
 
-    pub fn as_family(&self) -> Family {
+    pub fn as_family(&self) -> Family<'_> {
         match self {
             Self::Name(name) => Family::Name(name),
             Self::Serif => Family::Serif,
@@ -388,7 +388,7 @@ impl AttrsOwned {
         }
     }
 
-    pub fn as_attrs(&self) -> Attrs {
+    pub fn as_attrs(&self) -> Attrs<'_> {
         Attrs {
             color_opt: self.color_opt,
             family: self.family_owned.as_family(),
@@ -422,7 +422,7 @@ impl AttrsList {
     }
 
     /// Get the default [Attrs]
-    pub fn defaults(&self) -> Attrs {
+    pub fn defaults(&self) -> Attrs<'_> {
         self.defaults.as_attrs()
     }
 
@@ -454,7 +454,7 @@ impl AttrsList {
     /// Get the attribute span for an index
     ///
     /// This returns a span that contains the index
-    pub fn get_span(&self, index: usize) -> Attrs {
+    pub fn get_span(&self, index: usize) -> Attrs<'_> {
         self.spans
             .get(&index)
             .map(|v| v.as_attrs())

src/buffer.rs

@@ -864,7 +864,7 @@ impl Buffer {
     }
 
     /// Get the visible layout runs for rendering and other tasks
-    pub const fn layout_runs(&self) -> LayoutRunIter {
+    pub fn layout_runs(&self) -> LayoutRunIter<'_> {
         LayoutRunIter::new(self)
     }