Update all import paths to include file extensions

I'm not crazy about this change, as I liked it when it inferred the extension automatically.

Also, it feels weird to provide a .js file extension when I'm writing TypeScript files.

However, this seems to be necessary for pure-ESModule packages, and after installing `markdown-table` I need to make these changes.

[1]:https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c#faq
[2]:microsoft/TypeScript#42813
[3]:https://www.typescriptlang.org/docs/handbook/module-resolution.html#classic
[4]:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules

src/commands/init.ts

@@ -2,7 +2,7 @@ import inquirer from "inquirer";
 import chalk from "chalk";
 import fs from "fs";
 import path from "path";
-import { writeContributors } from "../contributors";
+import { writeContributors } from "../contributors.js";
 
 const { prompt } = inquirer;
 

src/commands/matrix.ts

@@ -2,7 +2,7 @@ import gitlog, { CommitField } from "gitlog";
 import { isEqual, parseISO } from "date-fns";
 import fs from "fs";
 import { markdownTable } from "markdown-table";
-import { getContributors } from "../contributors";
+import { getContributors } from "../contributors.js";
 
 const outputMarkdownTable = (table: Record<string, Record<string, number>>) => {
   const matrix = [["", ...Object.keys(table)]];

src/commands/remove.ts

@@ -1,4 +1,4 @@
-import { getContributors, writeContributors } from "../contributors";
+import { getContributors, writeContributors } from "../contributors.js";
 
 export const remove = (removal: string) => {
   const contributors = getContributors().filter(

src/commands/start.ts

@@ -1,7 +1,9 @@
 import { writeFileSync } from "fs";
-import { prompt } from "inquirer";
+import inquirer from "inquirer";
 import chalk from "chalk";
-import { getContributors } from "../contributors";
+import { getContributors } from "../contributors.js";
+
+const { prompt } = inquirer;
 
 const createSessionFile = (pairs: string[]) => {
   console.info(chalk.yellowBright("Creating pairing session file now"));