Additional operators from upstream (#273)

See upstream PRs

* JuliaLang/julia#47647
    - `⟇` `\veedot` operator
* JuliaLang/julia#49623
    - `⥺` `\leftarrowsubset`
    - `⥷` `\leftarrowless`

Author: c42f

src/kinds.jl

@@ -255,7 +255,9 @@ const _kind_names =
         "⭁"
         "⭂"
         "⭃"
+        "⥷"
         "⭄"
+        "⥺"
         "⭇"
         "⭈"
         "⭉"
@@ -637,6 +639,7 @@ const _kind_names =
         "⊽"
         "⋎"
         "⋓"
+        "⟇"
         "⧺"
         "⧻"
         "⨈"

test/tokenize.jl

@@ -882,6 +882,9 @@ end
             "⫪ ⫫"
         ])
     end
+    if VERSION >= v"1.10-DEV"
+        push!(ops, "⥷ ⥺ ⟇")
+    end
     allops = split(join(ops, " "), " ")
     @test all(s->Base.isoperator(Symbol(s)) == is_operator(first(collect(tokenize(s))).kind), allops)
 end