ci: updates Node.js versions (#120)

diff --git a/.appveyor.yml b/.appveyor.yml
index a7b2426..9c59b29 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -12,12 +12,12 @@
   - Visual Studio 2017
 
 environment:
-  nodejs_version: "4"
   matrix:
-    - PLATFORM: windows-10-store
-      JUST_BUILD: --justBuild
+    - nodejs_version: "10"
+    - nodejs_version: "12"
+
 install:
-  - npm cache clean -f
+  - ps: Install-Product node $env:nodejs_version
   - node --version
   - npm install -g cordova-paramedic@https://github.com/apache/cordova-paramedic.git
   - npm install -g cordova
@@ -25,4 +25,4 @@
 build: off
 
 test_script:
-  - cordova-paramedic --config pr\%PLATFORM% --plugin . %JUST_BUILD%
+  - cordova-paramedic --config pr\windows-10-store --plugin . --justBuild
diff --git a/.travis.yml b/.travis.yml
index e73004d..721d555 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,4 @@
-# This Travis configuration file is built after a Cordova Paramedic 
+# This Travis configuration file is built after a Cordova Paramedic
 # specific template with minimal modifications and adaptations:
 # https://github.com/apache/cordova-paramedic/blob/master/.travis.yml
 
@@ -11,18 +11,18 @@
 env:
   global:
     - SAUCE_USERNAME=snay
-    - TRAVIS_NODE_VERSION=8
+    - TRAVIS_NODE_VERSION=12
     - ANDROID_API_LEVEL=28
     - ANDROID_BUILD_TOOLS_VERSION=28.0.3
 
 language: node_js
-node_js: 8
+node_js: 12
 
 # yaml anchor/alias: https://medium.com/@tommyvn/travis-yml-dry-with-anchors-8b6a3ac1b027
 
 _ios: &_ios
   os: osx
-  osx_image: xcode10.2
+  osx_image: xcode10.3
 
 _android: &_android
   language: android
@@ -34,12 +34,12 @@
       - build-tools-$ANDROID_BUILD_TOOLS_VERSION
       - android-$ANDROID_API_LEVEL
     licenses:
-      - 'android-sdk-preview-license-.+'
-      - 'android-sdk-license-.+'
-      - 'google-gdk-license-.+'
+      - "android-sdk-preview-license-.+"
+      - "android-sdk-license-.+"
+      - "google-gdk-license-.+"
 
 matrix:
-  include:    
+  include:
     # local tests, without saucelabs
     - env: PLATFORM=local/browser
       <<: *_ios
@@ -76,13 +76,13 @@
 
 before_install:
   # manually install Node for `language: android`
-  - if [[ "$PLATFORM" =~ android ]]; then nvm install $TRAVIS_NODE_VERSION; fi 
+  - if [[ "$PLATFORM" =~ android ]]; then nvm install $TRAVIS_NODE_VERSION; fi
   - node --version
   - if [[ "$PLATFORM" =~ android ]]; then gradle --version; fi
   - if [[ "$PLATFORM" =~ ios ]]; then npm install -g ios-deploy; fi
   - npm install -g cordova
   # install paramedic if not running on paramedic repo
-  - if ! [[ "$TRAVIS_REPO_SLUG" =~ cordova-paramedic ]]; then npm install -g github:apache/cordova-paramedic; fi 
+  - if ! [[ "$TRAVIS_REPO_SLUG" =~ cordova-paramedic ]]; then npm install -g github:apache/cordova-paramedic; fi
 
 install:
   - npm install
@@ -111,8 +111,9 @@
     echo "PARAMEDIC_BUILDNAME=$PARAMEDIC_BUILDNAME"
 script:
   - $TEST_COMMAND
-  - if [[ "$ADDITIONAL_TESTS_DIR" != "" ]]; then
+  - |
+    if [[ "$ADDITIONAL_TESTS_DIR" != "" ]]; then
       cd $ADDITIONAL_TESTS_DIR && npm install && npm test;
-    else 
-      $PARAMEDIC_COMMAND --config ./pr/$PLATFORM --plugin $PARAMEDIC_PLUGIN_TO_TEST --buildName $PARAMEDIC_BUILDNAME; 
+    else
+      $PARAMEDIC_COMMAND --config ./pr/$PLATFORM --plugin $PARAMEDIC_PLUGIN_TO_TEST --buildName $PARAMEDIC_BUILDNAME;
     fi