Added OpenEdgeABL lexer (#585)

Author: MrGussio

Diff for: README.md

@@ -50,7 +50,7 @@ K | Kotlin
 L | Lighttpd configuration file, LLVM, Lua
 M | Mako, markdown, Mason, Mathematica, Matlab, MiniZinc, MLIR, Modula-2, MonkeyC, MorrowindScript, Myghty, MySQL
 N | NASM, Newspeak, Nginx configuration file, Nim, Nix
-O | Objective-C, OCaml, Octave, OnesEnterprise, OpenSCAD, Org Mode
+O | Objective-C, OCaml, Octave, OnesEnterprise, OpenEdge ABL, OpenSCAD, Org Mode
 P | PacmanConf, Perl, PHP, PHTML, Pig, PkgConfig, PL/pgSQL, plaintext, Pony, PostgreSQL SQL dialect, PostScript, POVRay, PowerShell, Prolog, PromQL, Protocol Buffer, Puppet, Python 2, Python
 Q | QBasic
 R | R, Racket, Ragel, Raku, react, ReasonML, reg, reStructuredText, Rexx, Ruby, Rust