Fix logs streaming output format. Fix null exception on streaming

[MAKARD]

I noticed that with --stream argument the output is unformatted as follows:

+------------------------------------------------------------------------------+
|                            bitrise summary: empty                            |
+---+---------------------------------------------------------------+----------+
|   | title                                                         | time (s) |
+---+---------------------------------------------------------------+----------+
| \u001b[32;1m✓\u001b[0m | \u001b[32;1mScript\u001b[0m                                                        | 2.08 sec |
+---+---------------------------------------------------------------+----------+
| \u001b[32;1m✓\u001b[0m | \u001b[32;1mDeploy to Bitrise.io - Build Artifacts, Test Reports, and P...\u001b[0m| 7.65 sec |
+---+---------------------------------------------------------------+----------+
| Total runtime: 9.73 sec                                                      |
+------------------------------------------------------------------------------+


\u001b[32;1mBitrise build successful\u001b[0m

And also, I'm getting jq: error (at <stdin>:1): Cannot iterate over null (null) once per trigger at the beginning of execution.
I assumed that's because the first log response does not contain the expected json

[05:13:41] REQUEST: curl --silent -X GET https://api.bitrise.io/v0.1/apps/[REDACTED]/json' 
[05:13:41] RESPONSE: {"message":"could not list build log chunks: build log not found"}

[05:13:52] REQUEST: curl --silent -X GET https://api.bitrise.io/v0.1/apps/[REDACTED]/json' 
[05:13:52] RESPONSE: {"log_chunks":[],"next_before_timestamp":"0001-01-01T00:00:00Z","next_after_timestamp":"0001-01-01T00:00:00Z","is_archived":false}