fix(deps): update dependency @po.et/poet-js to v3 (#102)

fix: use the new claIm type

Use the claim type defined in poet-js

BREAKING CHANGE: change in claim type definition

.travis.yml

@@ -1,4 +1,10 @@
 language: node_js
+before_install:
+  - sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+  - sudo apt-get update
+  - sudo apt-get install gcc-5 g++-5
+  - sudo rm /usr/bin/g++
+  - sudo ln -s /usr/bin/g++-5 /usr/bin/g++
 script:
   - npm run lint
   - npm run build