syntax: lua: add new and missing standard library functions

The list now includes all the Lua 5.3 functions listed on
https://www.lua.org/manual/5.3/#index

.

Also, remove the coloring of just the library name, so that
only known library functions get highlighted.
Signed-off-by: Tom Levy <tomlevy93@gmail.com>

syntax/lua.nanorc

@@ -17,20 +17,21 @@ color brightyellow ":|\*|/|%|\+|-|\^|>|>=|<|<=|~=|=|\.\.|\<(not|and|or)\>"
 color brightblue "\<(do|end|while|repeat|until|if|elseif|then|else|for|in|function|local|return|break)\>"
 
 # Keywords
-color brightyellow "\<(io|math|os|string|table|coroutine|debug)\."
-color brightyellow "\<(_G|_VERSION|assert|collectgarbage|dofile|error|getfenv|getmetatable|ipairs|load|loadfile|module|next|pairs|pcall|print|rawequal|rawget|rawset|require|select|setfenv|setmetatable|tonumber|tostring|type|unpack|xpcall)\s*\("
+color brightyellow "\<(_G|_VERSION|assert|collectgarbage|dofile|error|getfenv|getmetatable|ipairs|load|loadfile|module|next|pairs|pcall|print|rawequal|rawget|rawlen|rawset|require|select|setfenv|setmetatable|tonumber|tostring|type|unpack|xpcall)\s*\("
 
 # Standard library
 color brightyellow "\<io\.(close|flush|input|lines|open|output|popen|read|tmpfile|type|write|stdin|stdout|stderr)\>"
 color brightyellow "\<math\.(abs|acos|asin|atan2|atan|ceil|cosh|cos|deg|exp|floor|fmod|frexp|huge|ldexp|log10|log)\>"
-color brightyellow "\<math\.(max|min|mod|modf|pi|pow|rad|random|randomseed|sinh|tan)\>"
+color brightyellow "\<math\.(max|maxinteger|min|mininteger|mod|modf|pi|pow|rad|random|randomseed|sinh|sin|sqrt|tan)\>"
+color brightyellow "\<math\.(tointeger|type|ult)\>"
 color brightyellow "\<os\.(clock|date|difftime|execute|exit|getenv|remove|rename|setlocale|time|tmpname)\>"
-color brightyellow "\<package\.(cpath|loaded|loadlib|path|preload|seeall)\>"
-color brightyellow "\<string\.(byte|char|dump|find|format|gmatch|gsub|len|lower|match|rep|reverse|sub|upper)\>"
-color brightyellow "\<table\.(concat|insert|maxn|remove|sort)\>"
-color brightyellow "\<coroutine\.(create|resume|running|status|wrap|yield)\>"
-color brightyellow "\<debug\.(debug|getfenv|gethook|getinfo|getlocal|getmetatable|getregistry|getupvalue)\>"
-color brightyellow "\<debug\.(setfenv|sethook|setlocal|setmetatable|setupvalue|traceback)\>"
+color brightyellow "\<package\.(config|cpath|loaded|loadlib|path|preload|searchers|searchpath|seeall)\>"
+color brightyellow "\<string\.(byte|char|dump|find|format|gmatch|gsub|len|lower|match|pack|packsize|rep|reverse|sub|unpack|upper)\>"
+color brightyellow "\<table\.(concat|insert|maxn|move|pack|remove|sort|unpack)\>"
+color brightyellow "\<coroutine\.(create|isyieldable|resume|running|status|wrap|yield)\>"
+color brightyellow "\<debug\.(debug|getfenv|gethook|getinfo|getlocal|getmetatable|getregistry|getupvalue|getuservalue)\>"
+color brightyellow "\<debug\.(setfenv|sethook|setlocal|setmetatable|setupvalue|setuservalue|traceback|upvalueid|upvaluejoin)\>"
+color brightyellow "\<utf8\.(char|charpattern|codepoint|codes|len|offset)\>"
 
 # File handle methods
 color brightyellow ":(close|flush|lines|read|seek|setvbuf|write)\>"