I'm getting the following warnings in the latest (8/30/18) version 1.5.0.
WARNING in ./node_modules/@progress/kendo-data-query/dist/es/odata.operators.js
15:52-58 "export 'ifElse' was not found in './funcs'
WARNING in ./node_modules/@progress/kendo-data-query/dist/es/odata-filtering.operators.js
36:42-48 "export 'ifElse' was not found in './funcs'
WARNING in ./node_modules/@progress/kendo-data-query/dist/es/odata-filtering.operators.js
37:49-55 "export 'ifElse' was not found in './funcs'
WARNING in ./node_modules/@progress/kendo-data-query/dist/es/odata-filtering.operators.js
70:92-98 "export 'ifElse' was not found in './funcs'