Error in GeneSymbolDetector and IDTypeDetector with non-string values

[thinkh]

• Release number or git hash: v7.0.0
• Web browser version and OS: Chrome 84
• Environment (local or deployed): both

Steps to reproduce

1. Upload a CSV or XSLX that contians boolean values

Observed behavior

Uncaught (in promise) TypeError: v.trim is not a function
    at Object.detectIDType (GeneSymbolDetector.ts:9)
    at valuetype_idtype.ts:98
    at Generator.next (<anonymous>)
    at fulfilled (tslib.es6.js:71)

tdp_publicdb/src/GeneSymbolDetector.ts

Lines 9 to 11 in 70a0d51

	if (!v || v.trim().length === 0) {
	continue; //skip empty samples
	}

Uncaught (in promise) TypeError: v.trim is not a function
    at Object.detectIDType (IDTypeDetector.ts:19)
    at valuetype_idtype.ts:98
    at Generator.next (<anonymous>)
    at fulfilled (tslib.es6.js:71)

tdp_publicdb/src/IDTypeDetector.ts

Lines 19 to 21 in 68a9a56

	if (v == null || v.trim().length === 0) {
	continue; //skip empty samples
	}

Expected behavior

The detectors should check for strings before using trim().