@uppy/compressor: migrate to TS

[mifi]

No description provided.

[github-actions]

Diff output files

diff --git a/packages/@uppy/compressor/lib/index.js b/packages/@uppy/compressor/lib/index.js
index ebd8c09..ba57f2d 100644
--- a/packages/@uppy/compressor/lib/index.js
+++ b/packages/@uppy/compressor/lib/index.js
@@ -92,6 +92,7 @@ export default class Compressor extends BasePlugin {
         }
       });
     const promises = fileIDs.map(fileID => {
+      var _file$type;
       const file = this.uppy.getFile(fileID);
       this.uppy.emit("preprocess-progress", file, {
         mode: "indeterminate",
@@ -103,7 +104,7 @@ export default class Compressor extends BasePlugin {
       if (!file.data.type) {
         file.data = file.data.slice(0, file.data.size, file.type);
       }
-      if (!file.type.startsWith("image/")) {
+      if (!((_file$type = file.type) != null && _file$type.startsWith("image/"))) {
         return Promise.resolve();
       }
       return compressAndApplyResult(file);

[mifi]

+      if (!((_file$type = file.type) != null && _file$type.startsWith("image/"))) {

maybe we should turn off this transpilation. ?. should be safe to use in all browsers?

[Murderlon]

Only one thing, otherwise LGTM

[Murderlon]

We want export ops for users and our naming pattern has been plugin name + Opts.

Suggested change

	interface Options extends PluginOpts, CompressorJS.Options {
	export interface CompressorOpts extends PluginOpts, CompressorJS.Options {