Add method aliases for Set

Author: ksss

core/set.rbs

@@ -532,6 +532,13 @@ class Set[unchecked out A]
   #
   def subset?: (self) -> bool
 
+  # <!--
+  #   rdoc-file=lib/set.rb
+  #   - <=(set)
+  # -->
+  #
+  alias <= subset?
+
   # <!--
   #   rdoc-file=lib/set.rb
   #   - proper_subset?(set)
@@ -540,6 +547,13 @@ class Set[unchecked out A]
   #
   def proper_subset?: (self) -> bool
 
+  # <!--
+  #   rdoc-file=lib/set.rb
+  #   - <(set)
+  # -->
+  #
+  alias < proper_subset?
+
   # <!--
   #   rdoc-file=lib/set.rb
   #   - superset?(set)
@@ -548,6 +562,13 @@ class Set[unchecked out A]
   #
   def superset?: (self) -> bool
 
+  # <!--
+  #   rdoc-file=lib/set.rb
+  #   - >=(set)
+  # -->
+  #
+  alias >= superset?
+
   # <!--
   #   rdoc-file=lib/set.rb
   #   - proper_superset?(set)
@@ -556,6 +577,13 @@ class Set[unchecked out A]
   #
   def proper_superset?: (self) -> bool
 
+  # <!--
+  #   rdoc-file=lib/set.rb
+  #   - >(set)
+  # -->
+  #
+  alias > proper_superset?
+
   # <!--
   #   rdoc-file=lib/set.rb
   #   - replace(enum)
@@ -587,6 +615,11 @@ class Set[unchecked out A]
   #
   def select!: () { (A) -> untyped } -> self?
 
+  # <!-- rdoc-file=lib/set.rb -->
+  # Equivalent to Set#select!
+  #
+  alias filter! select!
+
   # <!--
   #   rdoc-file=lib/set.rb
   #   - subtract(enum)