Create lgtm.yml
Create lgtm.yml

successful build: https://lgtm.com/logs/81490e1791b04537a40f6366d2b42f4b5bdb7a32/lang:cpp
X-DataInitiative/tick,Dekken/tick,X-DataInitiative/tick,X-DataInitiative/tick,Dekken/tick,Dekken/tick,Dekken/tick,X-DataInitiative/tick