Removes deprecated Numpy scalar type names

[beat-buesser]

Description

This pull request removes deprecated Numpy scalar type names.

Fixes #1204

Type of change

Please check all relevant options.

• Improvement (non-breaking)
• Bug fix (non-breaking)
• New feature (non-breaking)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

[codecov-commenter]

Codecov Report

Merging #1296 (1d99d87) into dev_1.9.0 (74512a8) will increase coverage by 0.08%.
The diff coverage is 89.16%.

@@              Coverage Diff              @@
##           dev_1.9.0    #1296      +/-   ##
=============================================
+ Coverage      90.45%   90.54%   +0.08%     
=============================================
  Files            234      234              
  Lines          18993    18993              
  Branches        3349     3349              
=============================================
+ Hits           17181    17198      +17     
+ Misses          1044     1033      -11     
+ Partials         768      762       -6     

Impacted Files	Coverage Δ
...asion/adversarial_patch/adversarial_patch_numpy.py	75.53% <ø> (ø)
...ion/adversarial_patch/adversarial_patch_pytorch.py	83.84% <ø> (ø)
.../adversarial_patch/adversarial_patch_tensorflow.py	82.52% <ø> (ø)
...attacks/evasion/auto_projected_gradient_descent.py	86.61% <0.00%> (ø)
art/attacks/evasion/dpatch.py	90.79% <ø> (ø)
...adient_descent/projected_gradient_descent_numpy.py	89.15% <0.00%> (ø)
art/defences/preprocessor/preprocessor.py	76.36% <0.00%> (ø)
art/preprocessing/audio/l_filter/numpy.py	90.14% <0.00%> (ø)
art/attacks/evasion/fast_gradient.py	84.54% <16.66%> (ø)
...timators/speech_recognition/pytorch_deep_speech.py	93.62% <50.00%> (ø)
... and 46 more

[lgtm-com]

This pull request introduces 1 alert when merging 025fa05 into bb5b5c1 - view on LGTM.com

new alerts:

• 1 for Unused import

[minhitbk]

OK.

[lgtm-com]

This pull request introduces 1 alert when merging f1d7c16 into 2fadf9b - view on LGTM.com

new alerts:

• 1 for Unused import

[lgtm-com]

This pull request introduces 1 alert when merging 685a070 into 1a5e026 - view on LGTM.com

new alerts:

• 1 for Unused import

[lgtm-com]

This pull request introduces 1 alert when merging bf44dbd into 24daff1 - view on LGTM.com

new alerts:

• 1 for Unused import

[lgtm-com]

This pull request introduces 1 alert when merging bf44dbd into 1a5e026 - view on LGTM.com

new alerts:

• 1 for Unused import