move to markdown-link-check for external links

.travis.yml

@@ -10,7 +10,7 @@ install:
   - "pip install -r tests-requirements.txt"
   - "pip install -r requirements.txt"
   - "npm install -g remark-cli remark-validate-links"
-  - "env GO111MODULE=on go get -u github.com/raviqqe/liche"
+  - "npm install -g markdown-link-check"
 script:
   ./tests.sh
 after_success:

tests.sh

@@ -82,17 +82,17 @@ else
   remark -f -u validate-links *.md
 fi
 
-## test the doc with liche
-## https://github.com/raviqqe/liche/
+## test the doc with markdown-link-check
+## https://github.com/tcort/markdown-link-check
 set +e
-which liche >/dev/null 2>&1
+which markdown-link-check >/dev/null 2>&1
 r="$?"
 set -e
 if [ "$r" != "0" ]; then
-  echo "[WARNING] install \"liche\" to test the doc"
+  echo "[WARNING] install \"markdown-link-check\" to test the doc"
 else
-  liche -r -v docs
-  liche -v README.md
+  for i in `find docs -iname '*.md'`; do markdown-link-check $i; done
+  markdown-link-check README.md
 fi
 
 ## done