fix test files

Fix missing `pip` in macOS builds
Add new builds to the matrix

PR-URL: nodejs/node-addon-api#257
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

.travis.yml

@@ -10,11 +10,15 @@ os:
 env:
   global:
     # https://github.com/jasongin/nvs/blob/master/doc/CI.md
-    - NVS_VERSION=1.2.0
+    - NVS_VERSION=1.4.2
   matrix:
     - NODEJS_VERSION=node/4
     - NODEJS_VERSION=node/6
     - NODEJS_VERSION=node/8
+    - NODEJS_VERSION=node/9
+    - NODEJS_VERSION=node/10
+    - NODEJS_VERSION=chakracore/8
+    - NODEJS_VERSION=chakracore/10
     - NODEJS_VERSION=nightly
     - NODEJS_VERSION=chakracore-nightly
 matrix:
@@ -35,7 +39,7 @@ addons:
       - g++-4.9
 before_install:
   # coveralls
-  - pip install --user cpp-coveralls
+  - pip2 install --user cpp-coveralls
   # compilers
   - if [ "$CXX" = "g++" -a "$TRAVIS_OS_NAME" = "linux" ]; then export CXX="g++-4.9" CC="gcc-4.9" AR="gcc-ar-4.9" RANLIB="gcc-ranlib-4.9" NM="gcc-nm-4.9" ; fi
   - if [ "$CXX" = "clang++" ]; then export NPMOPT=--clang=1 ; fi

appveyor.yml

@@ -1,11 +1,15 @@
 environment:
   # https://github.com/jasongin/nvs/blob/master/doc/CI.md
-  NVS_VERSION: 1.2.0
+  NVS_VERSION: 1.4.2
   fast_finish: true
   matrix:
     - NODEJS_VERSION: node/4
     - NODEJS_VERSION: node/6
     - NODEJS_VERSION: node/8
+    - NODEJS_VERSION: node/9
+    - NODEJS_VERSION: node/10
+    - NODEJS_VERSION: chakracore/8
+    - NODEJS_VERSION: chakracore/10
     - NODEJS_VERSION: nightly
     - NODEJS_VERSION: chakracore-nightly