feat: add pytest junit parser and simple test

__tests__/fixtures/external/pytest/single-case.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<testsuites>
+    <testsuite name="pytest" errors="0" failures="0" skipped="0" tests="1" time="0.178"
+               timestamp="2023-03-08T11:47:09.377238" hostname="0e634555ad5c">
+        <testcase classname="product_changes.tests.first_test.MyTestCase" name="test_something" time="0.133"/>
+    </testsuite>
+</testsuites>

__tests__/pytest-junit.test.ts

@@ -0,0 +1,24 @@
+import * as fs from 'fs'
+import * as path from 'path'
+
+import {PytestJunitParser} from '../src/parsers/pytest-junit/pytest-junit-parser'
+import {ParseOptions} from '../src/test-parser'
+import {normalizeFilePath} from '../src/utils/path-utils'
+
+describe('pytest-junit tests', () => {
+  it('test with one successful test', async () => {
+    const fixturePath = path.join(__dirname, 'fixtures', 'external', 'pytest', 'single-case.xml')
+    const filePath = normalizeFilePath(path.relative(__dirname, fixturePath))
+    const fileContent = fs.readFileSync(fixturePath, {encoding: 'utf8'})
+
+    const opts: ParseOptions = {
+      parseErrors: true,
+      trackedFiles: []
+    }
+
+    const parser = new PytestJunitParser(opts)
+    const result = await parser.parse(filePath, fileContent)
+    expect(result.tests).toBe(1)
+    expect(result.result).toBe('success')
+  })
+})