Bump up esbuild version in new template and on the BT site

[jaredcwhite]

This bumps up the esbuild dep version 0.15.x.

[render]

Your Render PR Server URL is https://bridgetown-beta-pr-646.onrender.com.

Follow its progress at https://dashboard.render.com/static/srv-cde00qarrk09sugr4op0.

[render]

Your Render PR Server URL is https://bridgetown-api-pr-646.onrender.com.

Follow its progress at https://dashboard.render.com/static/srv-cde00rarrk09sugr4ovg.

[andrewmcodes]

@jaredcwhite this might be of some interest to you https://github.com/andrewmcodes/bridgetown-esbuild-minifySyntax#readme

[KonnorRogers]

I haven't had time to look at this yet, but be careful with this one, 0.14.x -> 0.15.x I saw a breaking change with using relative file paths without "./"

I upgraded one of my library and had to add:

"." + path.sep

0.15.x -> https://github.com/KonnorRogers/bridgetown-quick-search/blob/df061f2fbdaddac2848f03807f01796fd356000e/esbuild.config.js#L12

0.14.x -> https://github.com/KonnorRogers/create-konnor-app/blob/fde3ec3003f2bbce77ce5ddbc2de85c78c6c3b0d/src/templates/browser-project/esbuild.config.js#L9

[andrewmcodes]

I haven't had time to look at this yet, but be careful with this one, 0.14.x -> 0.15.x I saw a breaking change with using relative file paths without "./"

I upgraded one of my library and had to add:

"." + path.sep

I've been running 0.15.12 since it came out without issue until I tried switching to typescript and got an error about relative paths similar to what @KonnorRogers mentions.

Without the leading "./", the path "frontend/javascript/index.js"
  is being interpreted as a package path instead

but this change in the config fixed it and I haven't had any other issues.

-entryPoints: ["frontend/javascript/index.js"],
+entryPoints: ["./frontend/javascript/index.js"],

[jaredcwhite]

@andrewmcodes @KonnorRogers OK I've added in the ./ at the start of the entryPoint, hopefully that's all we need to worry about.