Use cppcheck to scan the C++ code

Fix #379

.travis.yml

@@ -13,4 +13,4 @@ before_install:
   - sudo docker build -t rcldocker .
 
 script:
-  - sudo docker run -v $(pwd):/root/rclnodejs --rm rcldocker bash -i -c 'cd /root/rclnodejs && ./scripts/build.sh && npm test'
+  - sudo docker run -v $(pwd):/root/rclnodejs --rm rcldocker bash -i -c 'cd /root/rclnodejs && cppcheck --enable=all src/*.cpp src/*.hpp && ./scripts/build.sh && npm test'

Dockerfile

@@ -35,7 +35,8 @@ RUN  apt update && apt install -y \
      python3-setuptools \
      python3-yaml \
      python3-colcon-common-extensions \
-     cmake
+     cmake \
+     cppcheck
 
 RUN pip3 install -U setuptools
 

circle.yml

@@ -6,7 +6,7 @@ dependencies:
   pre:
     - brew update
     - brew uninstall python
-    - brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/f2a764ef944b1080be64bd88dca9a1d80130c558/Formula/python.rb
+    - brew install python
     - brew install python@2
     - brew install wget cmake cppcheck tinyxml eigen pcre poco
     # install dependencies for Fast-RTPS if you are using it