Pin chardet to latest version 3.0.4

[fstab50]

This PR pins chardet to the latest release 3.0.4.

Changelog

Changelog

3.0.4

-  Fix issue with `setup.py` where `pytest_runner` was always being installed. (PR 119, thanks zmedico)
-  Make sure `test.py` is included in the manifest (PR 118, thanks zmedico)
-  Fix a bunch of old URLs in the README and other docs. (PRs 123 and 129, thanks qfan and jdufresne)
-  Update documentation to no longer imply we test/support Python 3 versions before 3.3 (PR 130, thanks jdufresne)```



### 3.0.3
```This release fixes a crash when debugging logging was enabled.  (Issue 115, PRs 117 and 125)```



### 3.0.2
```Fixes an issue where `detect` would sometimes return `None` instead of a `dict` with the keys `encoding`, `language`, and `confidence` (Issue 113, PR 114).```



### 3.0.1
```This bugfix release fixes a crash in the EUC-TW prober when it encountered certain strings (Issue 67).```



### 3.0.0
```This release is long overdue, but still mostly serves as a placeholder for the impending 4.0.0 release, which will have retrained models for better accuracy.  For now, this release will get the following improvements up on PyPI:

-  Added support for Turkish ISO-8859-9 detection (PR 41, thanks queeup)
-  Commented out large unused sections of Big5 and EUC-KR tables to save memory (8bc4b89)
-  Removed Python 3.2 from testing, but add 3.4 - 3.6
-  Ensure that stdin is open with mode `'rb'` for `chardetect` CLI. (PR 38, thanks lpsinger)
-  Fixed `chardetect` crash with non-ascii file names (PR 39, thanks nkanaev)
-  Made naming conventions more Pythonic throughout (no more `mTypicalPositiveRatio`, and instead `typical_positive_ratio`)
-  Modernized test scripts and infrastructure so we've got Travis testing and all that stuff
-  Rename `filter_without_english_words` to `filter_international_words` and make it match current Mozilla implementation (PR 44, thanks rsnair2)
-  Updated `filter_english_letters` to match C implementation (c6654595)
-  Temporarily disabled Hungarian ISO-8859-2 and Windows-1250 detection because it is very inaccurate (da6c0a079)
-  Allow CLI sub-package to be importable (PR 55)
-  Add a `hypotheis`-based test (PR 66, thanks DRMacIver)
-  Strip endianness from UTF with BOM predictions so that the encoding can be passed directly to `bytes.decode()` (PR 73, thanks snoack)
-  Fixed broken links in docs (PR 90, thanks roskakori)
-  Added early exit to `chardetect` when encoding is detected instead of looping through entire file (PR 103, thanks jpz)
-  Use `bytearray` objects internally instead of `wrap_ord` calls, which provides a nice performance boost across the board (PR 106)
-  Add `language` property to probers and `UniversalDetector` results (PR 180)
-  Mark the 5 known test failures as such so we can have more useful Travis build results in the meantime (d588407)```



### 2.3.0
```In this release, we:
- Added support for CP932 detection (thanks to hashy).
- Fixed an issue where UTF-8 with a BOM would not be detected as UTF-8-SIG (8).
- Modified `chardetect` to use `argparse` for argument parsing.
- Moved docs to a `gh-pages` branch.  You can now access them at http://chardet.github.io.```



### 2.2.1
```Fix missing paren in chardetect.py```



### 2.2.0
```First version after merger with charade. Loads of little changes.```


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