eslintrc: allow 3 chained calls on one line

We have some semi-reasonable patterns of code which chain 3 calls on a
single line.  Unfortunately there doesn't seem to be a way to
distinguish between chaining for promises and for other things (like
text manipulation).  Line length can be a proxy for that, though.

.eslintrc.json

@@ -26,7 +26,7 @@
                 "MemberExpression": 2,
                 "ignoredNodes": [ "JSXAttribute" ]
             }],
-        "newline-per-chained-call": ["error", { "ignoreChainWithDepth": 2 }],
+        "newline-per-chained-call": ["error", { "ignoreChainWithDepth": 3 }],
         "lines-between-class-members": ["error", "always", { "exceptAfterSingleLine": true }],
         "prefer-promise-reject-errors": ["error", { "allowEmptyReject": true }],
         "no-var": "error",