feat: add option to filter issues by developer

```
storypointer -d <developer>
```

README.md

@@ -55,7 +55,7 @@ storypointer
 >
 > This tool is intended to be used by Red Hat employees on the Red Hat JIRA instance. It may be adapted to work with other JIRA instances in the future.
 
-```bash
+```md
 $ storypointer --help
 Usage: storypointer [options] [string]
 
@@ -68,6 +68,7 @@ Options:
   -V, --version                output the version number
   -c, --component [component]  Issue component
   -a, --assignee [assignee]    Issue assignee
+  -d, --developer [developer]  Issue developer
   -h, --help                   display help for command
 ```
 
@@ -79,7 +80,7 @@ Options:
 
 Size all issues of the `curl` component:
 
-```bash
+```md
 storypointer -c curl
 # output:
 JIRA Version: 9.12.10

src/jira.ts

@@ -47,12 +47,17 @@ export class Jira {
     return response.issues ?? raise('Jira.getIssuesByID(): missing issues.');
   }
 
-  async getIssues(component: string, assignee?: string) {
-    const assigneeQuery = assignee ? `AND assignee = "${assignee}"` : '';
+  async getIssues(
+    component: string | undefined,
+    assignee: string | undefined,
+    developer: string | undefined
+  ) {
     const componentQuery = component ? `AND component = ${component}` : '';
+    const assigneeQuery = assignee ? `AND assignee = "${assignee}"` : '';
+    const developerQuery = developer ? `AND developer = "${developer}"` : '';
 
     const response = await this.api.issueSearch.searchForIssuesUsingJqlPost({
-      jql: `${this.baseJQL} ${assigneeQuery} ${componentQuery} ORDER BY id DESC`,
+      jql: `${this.baseJQL} ${componentQuery} ${assigneeQuery} ${developerQuery} ORDER BY id DESC`,
       fields: [
         'id',
         'issuetype',

src/main.ts

@@ -39,7 +39,8 @@ const cli = async () => {
 
   program
     .option('-c, --component [component]', 'Issue component')
-    .option('-a, --assignee [assignee]', 'Issue assignee');
+    .option('-a, --assignee [assignee]', 'Issue assignee')
+    .option('-d, --developer [developer]', 'Issue developer');
 
   program.argument('[string]', 'Issue keys separated by `␣`');
 
@@ -61,7 +62,11 @@ const cli = async () => {
   const issues =
     args.length > 0
       ? await jira.getIssuesByID(args)
-      : await jira.getIssues(options.component, options.assignee);
+      : await jira.getIssues(
+          options.component,
+          options.assignee,
+          options.developer
+        );
 
   const numberOfIssues = issues.length;