[Dependabot](deps): Update ta-lib requirement from >=0.4.28 to >=0.8.1

[dependabot]

Updates the requirements on ta-lib to permit the latest version.

Release notes

Sourced from ta-lib's releases.

v0.8.1

• [CHANGE]: talib.stream is now the real streaming API of TA-Lib C 0.8.1: stream.SMA(close) returns a handle, not a value. handle.value is the value at the last history bar, handle.update(bar) costs O(1) and returns that bar's value, handle.peek(bar) evaluates a forming bar without committing it, and handle.copy() forks it. stream.SMA.open_and_fill() returns the handle and the Function API's series in one pass. A multi-output function answers with the same tuple the Function API returns. The old last-value functions -- talib.stream.SMA, talib.stream_SMA, and their _ta_lib.pyi stubs -- are gone; talib/stream.pyi types the handles instead.

  Migrating is stream.X(...) -> stream.X(...).value, and the compiler cannot find the sites for you: if stream.CDLDOJI(o, h, l, c): used to test the pattern and now tests a handle, which is always true.

• [NEW]: talib.InsufficientHistory, raised when a stream is opened with too little history. It is the library's one recoverable error, so it is catchable on its own rather than as a bare Exception.

• [FIX]: help(talib.SUPERTREND) and the abstract stub named the outputs real and integer; they are supertrend and trend, the names abstract.Function('SUPERTREND').output_names already reported.

• [FIX]: An empty array given to a function whose lookback is zero, such as talib.ACOS or talib.MA(x, timeperiod=1), made TA-Lib read and write one element outside the buffers, which could crash the interpreter later or corrupt memory silently. An empty input now returns empty outputs without calling TA-Lib, whatever the function and its parameters. The bug dates from 0.4.27.

Changelog

Sourced from ta-lib's changelog.

0.8.1

• [CHANGE]: talib.stream is now the real streaming API of TA-Lib C 0.8.1: stream.SMA(close) returns a handle, not a value. handle.value is the value at the last history bar, handle.update(bar) costs O(1) and returns that bar's value, handle.peek(bar) evaluates a forming bar without committing it, and handle.copy() forks it. stream.SMA.open_and_fill() returns the handle and the Function API's series in one pass. A multi-output function answers with the same tuple the Function API returns. The old last-value functions -- talib.stream.SMA, talib.stream_SMA, and their _ta_lib.pyi stubs -- are gone; talib/stream.pyi types the handles instead.

  Migrating is stream.X(...) -> stream.X(...).value, and the compiler cannot find the sites for you: if stream.CDLDOJI(o, h, l, c): used to test the pattern and now tests a handle, which is always true.

• [NEW]: talib.InsufficientHistory, raised when a stream is opened with too little history. It is the library's one recoverable error, so it is catchable on its own rather than as a bare Exception.

• [FIX]: help(talib.SUPERTREND) and the abstract stub named the outputs real and integer; they are supertrend and trend, the names abstract.Function('SUPERTREND').output_names already reported.

• [FIX]: An empty array given to a function whose lookback is zero, such as talib.ACOS or talib.MA(x, timeperiod=1), made TA-Lib read and write one element outside the buffers, which could crash the interpreter later or corrupt memory silently. An empty input now returns empty outputs without calling TA-Lib, whatever the function and its parameters. The bug dates from 0.4.27.

0.8.0

• [NEW]: Support TA-Lib C 0.8.1, which is now the minimum required version.

• [NEW]: The 40 functions TA-Lib C added since 0.7.1: AC, ADR, AO, CMF, CMOU, COPPOCK, CUMSUM, CVI, DONCHIAN, DPO, EFI, ER, ERI, FOSC, FRACTAL, HA, HMA, KC, KDJ, MARKETFI, MASSI, NVI, PERCENTILE, PERCENTRANK, PVI, PVO, PVT, QSTICK, RMA, RVI, RVOL, SMI, SUPERTREND, TSI, VHF, VORTEX, VWAP, VWMA, WAD, ZLEMA.

• [NEW]: New moving averages: MA_Type.HMA, MA_Type.DISABLED, MA_Type.DEFAULT, MA_Type.ZLEMA and MA_Type.RMA.

• [NEW]: set_unstable_period() and get_unstable_period() accept 'RMA', 'HA' and 'RVI'.

... (truncated)

Commits

• 8f5cadc docs: updates
• e5aab28 ci: add the dev-* release lane, pinned to the wheels' TA-Lib C
• f4ad30e test: accept a TA-Lib C newer than we require
• 9c7f7bd update README from TA-Lib C 0.7.1 to 0.8.1
• 7a10655 version bump
• f972213 fix(func): no input, no output
• bdb8c5e fix(func): SUPERTREND's outputs are supertrend and trend
• 7a5544c changelog: the streaming entries belong to the next release
• 25dd74b fix(abstract): stop relying on Cython resolving __NAME from class scope
• a93703b perf(stream): multi-output handles answer with a plain tuple
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

[dependabot]

Labels

The following labels could not be found: dependencies. Please create it before Dependabot can add it to a pull request.

Please fix the above issues or remove invalid values from dependabot.yml.