ci: Use version of semantic-release compatible with old git version

Author: lpatino10

.travis.yml

@@ -28,13 +28,13 @@ before_install:
   - sed -i.bak -e 's|https://nexus.codehaus.org/snapshots/|https://oss.sonatype.org/content/repositories/codehaus-snapshots/|g' ~/.m2/settings.xml
   - sudo apt-get update
   - sudo apt-get install python
-  - git clone git://git.kernel.org/pub/scm/git/git.git
   - npm install npm@latest -g
   - nvm install node
   - nvm use node
 
 install:
   - pip install --user bumpversion
+  - npm install [email protected]
   - npm install @semantic-release/exec
 
 script:
@@ -51,7 +51,7 @@ after_success:
 deploy:
   - provider: script
     skip_cleanup: true
-    script: npx semantic-release
+    script: semantic-release
     on:
       repo: watson-developer-cloud/java-sdk
       jdk: oraclejdk7