chore: add exemptions for type-coverage

- In these cases we know what the source data is so it is OK for now but in the future we should add
some proper validation

re #90

src/app/background.ts

@@ -56,6 +56,7 @@ const updateButtonState = async () => {
 
 browser.runtime.onMessage.addListener(
   async (rawMessage: unknown, sender: Runtime.MessageSender) => {
+    // type-coverage:ignore-next-line
     const message = rawMessage as Message;
     if (sender.tab === undefined) {
       return;

src/app/plugin.ts

@@ -16,6 +16,7 @@ export const init = (bitbucketServerScmModule: ScmModule) => {
 
   browser.runtime.onMessage.addListener(
     async (rawMessage: unknown, sender: Runtime.MessageSender) => {
+      // type-coverage:ignore-next-line
       const message = rawMessage as Message;
       console.log(
         `[Mule Preview] Received message from [${sender}]: [${JSON.stringify(

src/app/scms/bitbucket-server/scraper.ts

@@ -11,16 +11,18 @@ import { MessageType } from "~app/types/messenging";
 // browser so it should be free of dependencies and small as possible
 (() => {
   const isPullRequest = (
-    pageState: unknown
+    pageState: CommonPageState
   ): pageState is PullRequestPageState => {
+    // type-coverage:ignore-next-line
     const prPageState = pageState as PullRequestPageState;
     return (
       prPageState.getPullRequest !== undefined &&
       prPageState.getPullRequest() !== undefined
     );
   };
 
-  const isDiff = (pageState: unknown): pageState is DiffPageState => {
+  const isDiff = (pageState: CommonPageState): pageState is DiffPageState => {
+    // type-coverage:ignore-next-line
     const diffPageState = pageState as DiffPageState;
     return (
       diffPageState.getSourceRepository !== undefined &&

src/app/scms/bitbucket-server/ui.ts

@@ -39,12 +39,14 @@ export const getCurrentFile = () => {
 
 export const getBitbucketData = async (): Promise<ScraperResponse> => {
   return new Promise((resolve, reject) => {
+    // TODO: Work out why there is a force cast to EventListener here
+    // type-coverage:ignore-next-line
     document.addEventListener("BitbucketDataScraped", ((
       event: CustomEvent<ScraperResponse>
     ) => {
-      console.log(`Recieved ["BitbucketDataScraped"] event!`);
+      console.log(`Received ["BitbucketDataScraped"] event!`);
       resolve(event.detail);
-    }) as EventListener);
+    }) as EventListener); 
     setTimeout(
       () => reject(new Error("Took too long to scrape Bitbucket data")),
       1000