Populate available session token in presigned_url()

[dtaniwaki]

Minio's Presigned URL didn't support an IAM role which requires a session token for a presigned URL.

I followed the code of the botocore.
https://github.com/boto/botocore/blob/30206ab9e9081c80fa68e8b2cb56296b09be6337/botocore/auth.py#L484-L492

This PR has includes the fix of #998 because it cannot test the function without it.

[balamurugana]

Below is the actual way to fix the issue.

diff --git a/minio/api.py b/minio/api.py
index b4d9187..3bc4a5e 100644
--- a/minio/api.py
+++ b/minio/api.py
@@ -1601,6 +1601,9 @@ class Minio:  # pylint: disable=too-many-public-methods
         query_params = extra_query_params or {}
         query_params.update({"versionId": version_id} if version_id else {})
         query_params.update(response_headers or {})
+        creds = self._provider.retrieve() if self._provider else None
+        if creds and creds.session_token:
+            query_params["X-Amz-Security-Token"] = creds.session_token
         url = self._base_url.build(
             method,
             region,
@@ -1609,12 +1612,12 @@ class Minio:  # pylint: disable=too-many-public-methods
             query_params=query_params,
         )
 
-        if self._provider:
+        if creds:
             url = presign_v4(
                 method,
                 url,
                 region,
-                self._provider.retrieve(),
+                creds,
                 request_date or datetime.utcnow(),
                 int(expires.total_seconds()),
             )
diff --git a/minio/credentials/providers.py b/minio/credentials/providers.py
index 28b17e3..e3c5910 100644
--- a/minio/credentials/providers.py
+++ b/minio/credentials/providers.py
@@ -563,7 +563,7 @@ class WebIdentityClientGrantsProvider(Provider):
 
         jwt = self._jwt_provider_func()
 
-        query_params = {"Version", "2011-06-15"}
+        query_params = {"Version": "2011-06-15"}
         duration_seconds = self._get_duration_seconds(
             int(jwt.get("expires_in", "0")),
         )