editors: Add the new keywords to the syntax highlighter

Author: hexaredecimal

editors/Lite/language_piccodescript.lua

@@ -26,6 +26,8 @@ syntax.add {
     ["is"]             = "keyword",
     ["return"]         = "keyword",
     ["catch"]          = "keyword",
+    ["let"]          	 = "keyword",
+    ["in"]             = "keyword",
     ["await"]          = "keyword",
     ["true"]           = "literal",
     ["false"]          = "literal",

editors/emacs/piccodescript-mode.el

@@ -16,7 +16,7 @@
   '("true" "false" "await"))
 
 (defun piccode-keywords ()
-  '("import" "module" "if" "else" "when" "is" "do" "catch" "return"))
+  '("import" "module" "if" "else" "when" "is" "do" "catch" "return" "let" "in"))
 
 (defun piccode-font-lock-keywords ()
   (list

editors/nvim/syntax/pics.vim

@@ -38,7 +38,7 @@ syn region picsComment start="\/\/" end="$" contains=picsComment,picsTodo,@Spell
 " syn region   picsComment start="\%%" contains=picsComment,picsTodo,@Spell
 syn keyword  picsTodo contained TODO FIXME
 
-syn keyword  picsKeyword  module when is if else import do catch return
+syn keyword  picsKeyword  module when is if else import do catch return let in
 
 syn keyword  picsBoolean      true false
 syn match    picsConstructor  "(\s*)"

editors/vscode/piccodescript-syntax-highlighting-0.0.1.vsix

@@ -14,7 +14,7 @@
     "main": {
       "patterns": [
         {
-          "match": "\\b(if|else|import|module|do|when|is|return|catch)\\b",
+          "match": "\\b(if|else|import|module|do|when|is|return|catch|let|in)\\b",
           "name": "keyword.piccodescript"
         },
         {