Fix travis release condition

Travis pulls tag as branch, so 'branch = master' is never true.
Use same regexp as earlier build.sh did

.travis.yml

@@ -2,6 +2,7 @@ language: python
 python:
 - '2.7'
 sudo: false
+conditions: v1
 cache:
  directories:
  - "~/.npm"
@@ -19,7 +20,7 @@ script:
 stages:
 - name: Test
 - name: Release
- if: tag IS present AND branch = master
+ if: tag IS present AND tag =~ ^\d+\.\d+\.\d+$
 jobs:
  include:
  - stage: Test
@@ -42,7 +43,6 @@ deploy:
  skip_cleanup: true
  on:
  tags: true
- branch: master
  repo: xoseperez/espurna
  condition: $TRAVIS_BUILD_STAGE_NAME = Release
 notifications: