exchanges/kraken,bittrex,gemini: Resolve Kraken panic, lint corrections, Bittrex batch tickers, set Gemini order limits and update tradable pairs (#1372)

* fix kraken, batch bittrex, fix lint

* surprise gemini!

* thought this happened automatically

* fix before shazbert sees

* fixes annoying atoi bug

* rm futures from gemini

* lint

* bittrex UpdatedAt, gemini Limits, stats relook

* STATS used HARDEN!(improve stats package)

* Whoopsies in your Daisies

* rm RWMutex, json stringeroo

* fixes additional index issues 😆 😭

exchanges/order/order_test.go

@@ -1511,9 +1511,14 @@ func TestMatchFilter(t *testing.T) {
 	}
 	// specific tests
 	for num, tt := range tests {
-		if tt.o.MatchFilter(&tt.f) != tt.expectedResult {
-			t.Errorf("tests[%v] failed", num)
-		}
+		num := num
+		tt := tt
+		t.Run(fmt.Sprintf("%v", num), func(t *testing.T) {
+			t.Parallel()
+			if tt.o.MatchFilter(&tt.f) != tt.expectedResult {
+				t.Errorf("tests[%v] failed", num)
+			}
+		})
 	}
 }