make thresholds and growth enums public

plugins/cost-insights/src/components/CostGrowth/CostGrowth.tsx

@@ -16,9 +16,9 @@
 
 import React from 'react';
 import classnames from 'classnames';
-import { ChangeStatistic, CurrencyType, Duration } from '../../types';
+import { ChangeStatistic, CurrencyType, Duration, EngineerThreshold, GrowthType } from '../../types';
 import { rateOf } from '../../utils/currency';
-import { growthOf, GrowthType, EngineerThreshold } from '../../utils/change';
+import { growthOf } from '../../utils/change';
 import { useCostGrowthStyles as useStyles } from '../../utils/styles';
 import { formatPercent, formatCurrency } from '../../utils/formatters';
 import { indefiniteArticleOf } from '../../utils/grammar';

plugins/cost-insights/src/types/ChangeStatistic.ts

@@ -20,3 +20,16 @@ export interface ChangeStatistic {
   // The actual USD change between time periods (can be negative if costs decreased)
   amount: number;
 }
+
+export const EngineerThreshold = 0.5;
+
+export enum ChangeThreshold {
+  upper = 0.05,
+  lower = -0.05,
+}
+
+export enum GrowthType {
+  Negligible,
+  Savings,
+  Excess,
+}