build(npm): Remove package-lock.json/yarn.lock

Author: pvdlg

.gitignore

@@ -126,3 +126,6 @@ $RECYCLE.BIN/
 *.lnk
 
 # End of https://www.gitignore.io/api/macos,windows,linux,node
+
+yarn.lock
+package-lock.json

.npmrc

@@ -0,0 +1 @@
+package-lock=false

.travis.yml

@@ -1,24 +1,14 @@
 language: node_js
 node_js:
   - 8
-cache:
-  directories:
-    - node_modules
 branches:
   only:
     - master
     - /^greenkeeper.*$/
 git:
   depth: 999
-before_install:
-  - npm install -g greenkeeper-lockfile@1
-before_script:
-  - npm prune
-  - greenkeeper-lockfile-update
 script:
   - npm run test
-after_script:
-  - greenkeeper-lockfile-upload
 after_success:
   - if [ -n "${CODECOV_TOKEN:-}" ]; then npm run codecov; fi
   - npm run semantic-release

.yarnrc

@@ -0,0 +1 @@
+--install.no-lockfile true