feat: export getAdapter function (#5324)

test/specs/api.spec.js

@@ -54,6 +54,10 @@ describe('static api', function () {
   it('should have mergeConfig properties', function () {
     expect(typeof axios.mergeConfig).toEqual('function');
   });
+
+  it('should have getAdapter properties', function () {
+    expect(typeof axios.getAdapter).toEqual('function');
+  });
 });
 
 describe('instance api', function () {

test/specs/instance.spec.js

@@ -24,6 +24,7 @@ describe('instance', function () {
         'getUri',
         'isAxiosError',
         'mergeConfig',
+        'getAdapter',
         'VERSION',
         'default',
         'toFormData',