chore: fix NPM token

Use token defined on Travis CI environment instead of encrypted token.

Author: steabert

.travis.yml

@@ -39,10 +39,9 @@ deploy:
       repo: AxisCommunications/media-stream-library-js
       node: '12'
   - provider: npm
-    email: [email protected]
-    tag: $NPM_TAG
-    api_key:
-      secure: D3qrZAW0kMoCpCjCThX1oIg8v0B+Bf2Ab7bX7drJjARaa6JUL3euFu103H9R2zJNBT9BrwtLeX/cS5fSgwg4i7pVkY+eb4a+7T+TeQuB1epXcGHOIhqfWbz3FKqyg3B4mXTSOdh1ptsrQh7S9XVLqgpHGgs2nVzVQnMUuzI8+AjZlSRcVslaT4Tc+FZa6802e7k4ig14zykVN3hwgeqr5qysnQ0Wf9cfJC+PUE+oNvJDieZE/C8CWHHXCUsngTLJ5mPpj9+MdabC+sgOsoe9kKKragAwGaX6PZ59RRsBC2G9WCjI3Cz72M+0eDsPd3/cJ2aNyZHId4ABPZHd35O6bJERxj3I9V+yPBz933aQ25waZ/iKPQdNrlxwfniO2m/xVqQaUovWH7Y5uiarZFFUpbnogMfrLarRsBUXmqi/mdUS/0jlCOp/TXe15uiCsWm6t9vn0phF0zY5xM/VoeFFcu1hLxhy3AyHtZltGVhCCtzBcwv3RANQmNmqA1DY6mXE0dskeIaGfB1UjefOSjTSGYvPau+xePYya8SR5nSUTthDUTxYROflYTdr7cyQAEDof+gwrvtq0idtGGsPOnzRsrGed3EkgBn1pkYOpyw4SCP2GhqQRuAJ1m0OHA1KVsc0fVMWCgn+9jlB+Hhpb6W/64JScfXuuB7M3MYLX4AKUm8=
+    email: "$NPM_EMAIL"
+    tag: "$NPM_TAG"
+    api_key: "$NPM_TOKEN"
     skip_cleanup: true
     on:
       tags: true