chore(tslint)

Author: christopherthielen

tslint.json

@@ -35,7 +35,7 @@
     "no-trailing-comma": true,
     "no-trailing-whitespace": false,
     "no-unreachable": true,
-    "no-unused-expression": true,
+    "no-unused-expression": [true, "allow-fast-null-checks"],
     "no-unused-variable": true,
     "no-use-before-declare": true,
     "no-var-keyword": true,