Fix loading values when a line has " }" after a boolean

[thombashi]

This PR aims to fix psf/black#637

The issue can be reproduce as follows (Python 3.7 with toml 0.10.0):

>>> import toml
>>> toml.loads(r"""
... [tool.poetry.dev-dependencies]
... black = { python=">3.6", version=">=18.9b0", allow_prereleases=true }
... """)
Traceback (most recent call last):
  File "/home/.../site-packages/toml/decoder.py", line 456, in loads
    multibackslash)
  File "/home/.../site-packages/toml/decoder.py", line 725, in load_line
    value, vtype = self.load_value(pair[1], strictly_valid)
  File "/home/.../site-packages/toml/decoder.py", line 805, in load_value
    self.load_inline_object(v, inline_object)
  File "/home/.../site-packages/toml/decoder.py", line 624, in load_inline_object
    multibackslash)
  File "/home/.../site-packages/toml/decoder.py", line 678, in load_line
    raise ValueError("Invalid date or number")
ValueError: Invalid date or number

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 4, in <module>
  File "/home/.../site-packages/toml/decoder.py", line 458, in loads
    raise TomlDecodeError(str(err), original, pos)
toml.decoder.TomlDecodeError: Invalid date or number (line 3 column 1 char 32)

[uiri]

Hi Tsuyoshi,

Thank you for the pull request!

I think the test case should be added to the toml test suite rather than here. test_api.py is supposed to test the python library API, not valid/invalid TOML test cases.

The bug fix itself looks good.

[thombashi]

Hi,

Thank you for reviewing.
I did revert the test case from this PR, and create a PR to toml-test (toml-lang/toml-test#55).