Update to work with Lua 5.4 (#27)

* updates for lua 5.4

.travis.yml

@@ -5,6 +5,7 @@ env:
   - LUA="lua=5.1"
   - LUA="lua=5.2"
   - LUA="lua=5.3"
+  - LUA="lua=5.4"
   - LUA="luajit=2.0"
   - LUA="luajit=2.1"
 

README.md

@@ -1,7 +1,7 @@
 # ftcsv
 [![Build Status](https://travis-ci.org/FourierTransformer/ftcsv.svg?branch=master)](https://travis-ci.org/FourierTransformer/ftcsv) [![Coverage Status](https://coveralls.io/repos/github/FourierTransformer/ftcsv/badge.svg?branch=master)](https://coveralls.io/github/FourierTransformer/ftcsv?branch=master)
 
-ftcsv is a fast csv library written in pure Lua. It's been tested with LuaJIT 2.0/2.1 and Lua 5.1, 5.2, and 5.3
+ftcsv is a fast csv library written in pure Lua. It's been tested with LuaJIT 2.0/2.1 and Lua 5.1, 5.2, 5.3, and 5.4
 
 It features two parsing modes, one for CSVs that can easily be loaded into memory (up to a few hundred MBs depending on the system), and another for loading files using an iterator - useful for manipulating large files or processing during load. It correctly handles most csv (and csv-like) files found in the wild, from varying line endings (Windows, Linux, and OS9), UTF-8 BOM support, and odd delimiters. There are also various options that can tweak how a file is loaded, only grabbing a few fields, renaming fields, and parsing header-less files!
 

ftcsv-1.2.1-1.rockspec

@@ -1,9 +1,9 @@
 package = "ftcsv"
-version = "1.2.0-1"
+version = "1.2.1-1"
 
 source = {
 	url = "git://github.com/FourierTransformer/ftcsv.git",
-	tag = "1.2.0"
+	tag = "1.2.1"
 }
 
 description = {
@@ -23,7 +23,7 @@ description = {
 }
 
 dependencies = {
-	"lua >= 5.1, <5.4",
+	"lua >= 5.1",
 }
 
 build = {