Lua: Add support for more advanced syntax

[LaurentGoderre]

Base on the Kong image: https://hub.docker.com/_/kong

Before this PR

NAME                   VERSION                                  TYPE        
LPeg                   1.0.2-1                                  lua-rocks    
LuaFileSystem          1.8.0-1                                  lua-rocks            
ansicolors             1.0.2-3                                  lua-rocks          
binaryheap             0.4-1                                    lua-rocks             
etlua                  1.3.0-1                                  lua-rocks             
inspect                3.1.3-0                                  lua-rocks             
kong                   3.5.0-0                                  lua-rocks    
kong-lapis             1.14.0.3-1                               lua-rocks    
kong-pgmoon            1.16.2-1                                 lua-rocks            
loadkit                1.1.0-1                                  lua-rocks             
lua-MessagePack        0.5.2-1                                  lua-rocks    
lua-ffi-zlib           0.6-0                                    lua-rocks    
lua-protobuf           0.5.0-1                                  lua-rocks    
lua-resty-acme         0.12.0-1                                 lua-rocks    
lua-resty-counter      0.2.1-1                                  lua-rocks    
lua-resty-healthcheck  1.6.3-1                                  lua-rocks    
lua-resty-http         0.17.1-0                                 lua-rocks    
lua-resty-ipmatcher    0.6.1-0                                  lua-rocks    
lua-resty-jit-uuid     0.0.7-2                                  lua-rocks    
lua-resty-openssl      0.8.25-1                                 lua-rocks    
lua-resty-session      4.0.5-1                                  lua-rocks    
lua-resty-timer        1.1.0-1                                  lua-rocks    
lua-resty-timer-ng     0.2.5-1                                  lua-rocks    
lua_pack               2.0.0-0                                  lua-rocks    
lua_system_constants   0.1.4-0                                  lua-rocks    
luarocks               3.9.2-1                                  lua-rocks    
luatz                  0.4-1                                    lua-rocks    
luaxxhash              1.0.0-1                                  lua-rocks             
multipart              0.5.9-1                                  lua-rocks           
net-url                1.1-1                                    lua-rocks            
version                1.0.1-2                                  lua-rocks    

After:

NAME                   VERSION                                  TYPE        
LPeg                   1.0.2-1                                  lua-rocks    
LuaFileSystem          1.8.0-1                                  lua-rocks    
LuaSec                 1.3.2-1                                  lua-rocks    
LuaSocket              3.0rc1-2                                 lua-rocks           
ansicolors             1.0.2-3                                  lua-rocks            
binaryheap             0.4-1                                    lua-rocks            
date                   2.2.1-1                                  lua-rocks            
etlua                  1.3.0-1                                  lua-rocks              
inspect                3.1.3-0                                  lua-rocks            
kong                   3.5.0-0                                  lua-rocks    
kong-lapis             1.14.0.3-1                               lua-rocks    
kong-pgmoon            1.16.2-1                                 lua-rocks             
loadkit                1.1.0-1                                  lua-rocks            
lua-MessagePack        0.5.2-1                                  lua-rocks    
lua-ffi-zlib           0.6-0                                    lua-rocks    
lua-protobuf           0.5.0-1                                  lua-rocks    
lua-resty-acme         0.12.0-1                                 lua-rocks    
lua-resty-aws          1.3.5-1                                  lua-rocks    
lua-resty-counter      0.2.1-1                                  lua-rocks    
lua-resty-healthcheck  1.6.3-1                                  lua-rocks    
lua-resty-http         0.17.1-0                                 lua-rocks    
lua-resty-ipmatcher    0.6.1-0                                  lua-rocks    
lua-resty-jit-uuid     0.0.7-2                                  lua-rocks    
lua-resty-ljsonschema  1.1.6-2                                  lua-rocks    
lua-resty-luasocket    1.1.1-1                                  lua-rocks    
lua-resty-openssl      0.8.25-1                                 lua-rocks    
lua-resty-session      4.0.5-1                                  lua-rocks    
lua-resty-timer        1.1.0-1                                  lua-rocks    
lua-resty-timer-ng     0.2.5-1                                  lua-rocks    
lua_pack               2.0.0-0                                  lua-rocks    
lua_system_constants   0.1.4-0                                  lua-rocks    
luaexpat               1.5.1-1                                  lua-rocks    
lualogging             1.8.2-1                                  lua-rocks    
luarocks               3.9.2-1                                  lua-rocks    
luasyslog              2.0.1-1                                  lua-rocks    
luatz                  0.4-1                                    lua-rocks    
luaxxhash              1.0.0-1                                  lua-rocks    
lyaml                  6.2.8-1                                  lua-rocks             
multipart              0.5.9-1                                  lua-rocks            
net-url                1.1-1                                    lua-rocks             
penlight               1.13.1-1                                 lua-rocks            
version                1.0.1-2                                  lua-rocks