ci: install tinycbor

Author: postables

.travis.yml

@@ -19,6 +19,7 @@ before_install:
   - sudo apt install valgrind -y
   - make install-cmocka
   - make install-mbedtls
+  - make install-tinycbor
 
 script:
   # Link gcc-9 and g++-9 to their standard commands