Update CI script, switch to codecov for coverage uploads

.travis.yml

@@ -6,15 +6,15 @@ env:
   - LUA="lua 5.2"
   - LUA="lua 5.3"
   - LUA="luajit 2.0"
+  - LUA="luajit 2.1"
 
 before_install:
   - pip install hererocks
-  - hererocks l -r^ --$LUA
-  - export PATH=$PATH:$PWD/l/bin
-  - luarocks install luacheck
-  - luarocks install dkjson --deps-mode=none
+  - hererocks lua_install --$LUA -r latest
+  - source lua_install/bin/activate
   - luarocks install busted
-  - luarocks install luacov-coveralls
+  - luarocks install cluacov
+  - luarocks install luacheck
 
 install:
   - luarocks make
@@ -23,5 +23,6 @@ script:
   - luacheck src spec
   - busted -c
 
-after_success:
-  - luacov-coveralls
+after_script:
+  - luacov
+  - codecov -X gcov

README.md

@@ -1,7 +1,7 @@
 # argparse
 
 [![Build Status](https://travis-ci.org/mpeterv/argparse.png?branch=master)](https://travis-ci.org/mpeterv/argparse)
-[![Coverage Status](https://coveralls.io/repos/mpeterv/argparse/badge.svg?branch=master&service=github)](https://coveralls.io/github/mpeterv/argparse?branch=master)
+[![Coverage Status](https://coveralls.io/repos/mpeterv/argparse/badge.svg?branch=master)](https://coveralls.io/r/mpeterv/argparse?branch=master)
 
 Argparse is a feature-rich command line parser for Lua inspired by argparse for Python.