fix(reporter): don't print all dots in one line (#31)

CI systems like GitHub Actions only print a line when a newline
character is printed. Add a newline character after each 100 dots to
flush output mid-test.

Also, fix the lockfile (without it, CI doesn't pass).

Fixes gh-30

Author: mgol

package-lock.json

@@ -2,6 +2,8 @@ import chalk from "chalk";
 import { prettyMs } from "./lib/prettyMs.js";
 import * as Diff from "diff";
 
+const MAX_DOTS_PER_LINE = 100;
+
 function serializeForDiff( value ) {
 
 	// Use naive serialization for everything except types with confusable values
@@ -14,11 +16,23 @@ function serializeForDiff( value ) {
 	return `${ value }`;
 }
 
+let currDots = 0;
+function writeDot() {
+	if ( currDots >= MAX_DOTS_PER_LINE ) {
+
+		// Write a newline character occasionally to force a CI output flush.
+		process.stdout.write( "\n" );
+		currDots = 0;
+	}
+	currDots++;
+	process.stdout.write( "." );
+}
+
 export function reportTest( test, { fullBrowser, id } ) {
 	if ( test.status === "passed" ) {
 
-		// Write to console without newlines
-		process.stdout.write( "." );
+		// Write to console
+		writeDot();
 		return;
 	}
 
@@ -114,6 +128,8 @@ export function reportTest( test, { fullBrowser, id } ) {
 }
 
 export function reportError( error ) {
+	currDots = 0;
+
 	const title = `${ error.name || "Error" }: ${ error.message }`;
 	let message = chalk.red( title );
 
@@ -125,6 +141,8 @@ export function reportError( error ) {
 }
 
 export function reportEnd( result, { descriptiveUrl, fullBrowser, id } ) {
+	currDots = 0;
+
 	console.log(
 		`\n\nTests finished in ${ prettyMs( result.runtime ) } ` +
 			`at ${ chalk.yellow( descriptiveUrl ) } ` +