fix: remove getLastRelease to support semantic-release v12

semantic-release v12 requires getLastRelease to return a commit ID,
which the VS Code marketplace does not provide.

BREAKING CHANGE:
You need to change your package.json to use @semantic-release/git for
getLastRelease instead of semantic-release-vsce

README.md

@@ -8,20 +8,21 @@
 [![Greenkeeper](https://badges.greenkeeper.io/raix/semantic-release-vsce.svg)](https://greenkeeper.io/)
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 
-Semantic release plugin for vs code extensions
-
-NOTE: This package is still experimental - `semantic-release` multi plugins are not released
+Semantic release plugin for Visual Stuio Code extensions
 
 #### Add config to package.json
 
+Use `semantic-release-vsce` as part of `verifyConditions` and `publish`.
+For `getLastRelease` you should use `@semantic-release/git` (instead of the default npm implementation).
+
 ```json
 {
   "scripts": {
     "semantic-release": "semantic-release"
   },
   "release": {
     "verifyConditions": ["semantic-release-vsce", "@semantic-release/github"],
-    "getLastRelease": "semantic-release-vsce",
+    "getLastRelease": "@semantic-release/git",
     "publish": [
       {
         "path": "semantic-release-vsce",
@@ -34,7 +35,9 @@ NOTE: This package is still experimental - `semantic-release` multi plugins are
     ]
   },
   "devDependencies": {
-    "semantic-release": "^11.0.0"
+    "@semantic-release/git": "^2.0.0",
+    "semantic-release": "^12.0.0",
+    "semantic-release-vsce": "^2.0.0",
   }
 }
 ```

index.js

@@ -1,6 +1,5 @@
 const verifyVsce = require('./lib/verify');
 const vscePublish = require('./lib/publish');
-const getLastReleaseGallery = require('./lib/get-last-release');
 
 let verified;
 
@@ -9,14 +8,6 @@ async function verifyConditions (pluginConfig, {logger}) {
   verified = true;
 }
 
-async function getLastRelease (pluginConfig, {logger}) {
-  if (!verified) {
-    await verifyVsce(logger);
-    verified = true;
-  }
-  return getLastReleaseGallery(logger);
-}
-
 async function publish (pluginConfig, {nextRelease: {version}, logger}) {
   if (!verified) {
     await verifyVsce(logger);
@@ -27,6 +18,5 @@ async function publish (pluginConfig, {nextRelease: {version}, logger}) {
 
 module.exports = {
   verifyConditions,
-  getLastRelease,
   publish
 };

package.json

@@ -34,7 +34,7 @@
     "semantic-release": "^12.2.2"
   },
   "peerDependencies": {
-    "semantic-release": "^11.0.0"
+    "semantic-release": "^12.0.0"
   },
   "release": {
     "verifyConditions": "@semantic-release/github"