Update to ubuntu latest for CI

Author: orta

.github/workflows/CI.yml

@@ -3,7 +3,7 @@ on: pull_request
 
 jobs:
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
 
     steps:
       # Check out, and set up the node/ruby infra

source/danger.d.ts

@@ -1632,20 +1632,20 @@ declare const peril: PerilDSL
  * are wanting to introspect on whether a build has already failed.
  */
 declare const results: DangerRuntimeContainer
-export declare type Pattern = string
-export declare type Path = string
-export declare type KeyedPatterns<T> = {
+type Pattern = string
+type Path = string
+type KeyedPatterns<T> = {
   readonly [K in keyof T]: Pattern[]
 }
-export declare type KeyedPaths<T> = {
+type KeyedPaths<T> = {
   readonly [K in keyof T]: Path[]
 }
-export declare type _MatchResult<T> = {
+type _MatchResult<T> = {
   readonly [K in keyof T]: boolean
 }
-export declare type MatchResult<T> = _MatchResult<T> & {
+type MatchResult<T> = _MatchResult<T> & {
   /** Returns an object containing arrays of matched files instead of the usual boolean values. */
   getKeyedPaths(): KeyedPaths<T>
 }
 /** A vendored copy of the  Chainsmoker module on NPM */
-export declare type Chainsmoker<T> = (...patterns: Pattern[]) => MatchResult<T>
+type Chainsmoker<T> = (...patterns: Pattern[]) => MatchResult<T>