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

.gitignore

@@ -127,8 +127,11 @@ $RECYCLE.BIN/
 
 # End of https://www.gitignore.io/api/macos,windows,linux,node
 
+yarn.lock
+package-lock.json
+
 /preset.*
 /release-rules.*
 /lib
 /types.*
-/aliases.*
+/aliases.*

.npmrc

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

.travis.yml

@@ -3,9 +3,6 @@ node_js:
   - 8
   - 6
   - 4
-cache:
-  directories:
-    - node_modules
 branches:
   only:
     - master
@@ -14,28 +11,15 @@ git:
   depth: 999
 before_install:
   - if [[ `npm -v` < 5* ]]; then npm install -g npm@5; fi
-  - npm install -g greenkeeper-lockfile@1
-before_script:
-  - npm prune
-  - greenkeeper-lockfile-update
 script:
   - npm run test
-after_script:
-  - greenkeeper-lockfile-upload
 env:
   - BUILD_LEADER_ID=4
 jobs:
   include:
     - stage: release
       node_js: 8
-      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