[Tests] Test "make release" in Travis CI

.travis.yml

@@ -27,6 +27,7 @@ install:
   - if [ -z "${SHELLCHECK-}" ]; then nvm install node && npm install && npm prune && npm ls urchin doctoc; fi
   - '[ -z "$WITHOUT_CURL" ] || sudo apt-get remove curl -y'
 script:
+  - if [ -n "${MAKE_RELEASE-}" ]; then export GIT_EDITOR="sed -i '1 s/^/99.99.99 make release test/'" && git fetch --unshallow --tags && echo proceed | make TAG=99.99.99 release ; fi
   - if [ -n "${DOCTOCCHECK-}" ]; then cp README.markdown README.markdown.orig && npm run doctoc && diff -q README.markdown README.markdown.orig ; fi
   - if [ -n "${SHELLCHECK-}" ]; then shellcheck -s bash nvm.sh && shellcheck -s sh nvm.sh && shellcheck -s dash nvm.sh && shellcheck -s ksh nvm.sh ; fi
   - if [ -n "${SHELLCHECK-}" ]; then shellcheck -s bash install.sh bash_completion nvm-exec ; fi
@@ -38,6 +39,7 @@ env:
     - PATH="~/.cabal/bin/:$(echo $PATH | sed 's/::/:/')"
     - NVM_DIR="${TRAVIS_BUILD_DIR}"
   matrix:
+    - MAKE_RELEASE=true
     - DOCTOCCHECK=true
     - SHELLCHECK=true
     - SHELL=bash TEST_SUITE=install_script