chore(gatsby-telemetry): Migrate is-truthy to TypeScript

packages/gatsby-telemetry/src/__tests__/is-truthy.js → packages/gatsby-telemetry/src/__tests__/is-truthy.ts

@@ -1,4 +1,4 @@
-const isTruthy = require(`../is-truthy`)
+import { isTruthy } from "../is-truthy"
 
 describe(`isTruthy`, () => {
   it(`handles Booleans`, () => {

packages/gatsby-telemetry/src/event-storage.js

@@ -5,7 +5,7 @@ const fetch = require(`node-fetch`)
 const Configstore = require(`configstore`)
 const { ensureDirSync } = require(`fs-extra`)
 
-const isTruthy = require(`./is-truthy`)
+import { isTruthy } from "./is-truthy"
 
 /* The events data collection is a spooled process that
  * buffers events to a local fs based buffer

packages/gatsby-telemetry/src/is-truthy.js → packages/gatsby-telemetry/src/is-truthy.ts

@@ -1,6 +1,6 @@
 // Returns true for `true`, true, positive numbers
 // Returns false for `false`, false, 0, negative integers and anything else
-const isTruthy = value => {
+export function isTruthy(value: any): boolean {
   // Return if Boolean
   if (typeof value === `boolean`) return value
 
@@ -19,5 +19,3 @@ const isTruthy = value => {
   // Default to false
   return false
 }
-
-module.exports = isTruthy