Update changelog, remove substr

Closes #1234

CHANGELOG.md

@@ -2,6 +2,28 @@
 
 This changelog starts with the restructured 1.0.0 release that happened after context isolation changes. The changelogs here should more-or-less mirror the ones that get shown in the client but probably with less formatting and pizzazz.
 
+## 1.5.3
+
+### Added
+
+### Removed
+
+### Changed
+
+### Fixed
+- Fixed Canary crashing immediately
+
+## 1.5.2
+
+### Added
+
+### Removed
+
+### Changed
+
+### Fixed
+- Fixed being unable to inject into settings, thanks @Strencher
+
 ## 1.5.1
 
 ### Added

renderer/src/moduleloader.js

@@ -12,7 +12,7 @@ export default function() {
         }
 
         if (request === namespace || request.startsWith(prefix)) {
-            const requested = request.substr(prefix.length);
+            const requested = request.slice(prefix.length);
             if (requested == "bdapi") return BdApi;
         }
 

renderer/src/modules/addonmanager.js

@@ -164,8 +164,8 @@ export default class AddonManager {
             if (line.charAt(0) === "@" && line.charAt(1) !== " ") {
                 out[field] = accum;
                 const l = line.indexOf(" ");
-                field = line.substr(1, l - 1);
+                field = line.substring(1, l);
-                accum = line.substr(l + 1);
+                accum = line.substring(l + 1);
             }
             else {
                 accum += " " + line.replace("\\n", "\n").replace(escapedAtRegex, "@");