Allow un-reacting in read-only rooms

src/d2m/actions/create-room.js

@@ -147,7 +147,8 @@ async function channelToKState(channel, guild, di) {
 		"m.room.power_levels/": {
 			events_default: everyoneCanSend ? 0 : 50,
 			events: {
-				"m.reaction": 0
+				"m.reaction": 0,
+				"m.room.redaction": 0 // only affects redactions of own events, required to be able to un-react
 			},
 			notifications: {
 				room: everyoneCanMentionEveryone ? 0 : 20

src/d2m/actions/create-room.test.js

@@ -154,7 +154,8 @@ test("channel2room: read-only discord channel", async t => {
 		"m.room.power_levels/": {
 			events_default: 50, // <-- it should be read-only!
 			events: {
-				"m.reaction": 0
+				"m.reaction": 0,
+				"m.room.redaction": 0
 			},
 			notifications: {
 				room: 20,

test/data.js

@@ -75,7 +75,8 @@ module.exports = {
 			"m.room.power_levels/": {
 				events_default: 0,
 				events: {
-					"m.reaction": 0
+					"m.reaction": 0,
+					"m.room.redaction": 0
 				},
 				users: {
 					"@test_auto_invite:example.org": 100
@@ -3025,6 +3026,7 @@ module.exports = {
 			},
 			webhook_id: "1109360903096369153"
 		},
+
 		reply_with_only_embed: {
 			type: 19,
 			tts: false,