ARROW-5521: [Packaging] Use Apache RAT 0.13

[pitrou]

No description provided.

[codecov-io]

Codecov Report

Merging #4486 into master will increase coverage by 2.11%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master   #4486      +/-   ##
=========================================
+ Coverage   88.29%   90.4%   +2.11%     
=========================================
  Files         846      74     -772     
  Lines      103527    5464   -98063     
  Branches     1253    1253              
=========================================
- Hits        91411    4940   -86471     
+ Misses      11869     516   -11353     
+ Partials      247       8     -239

Impacted Files	Coverage Δ
python/pyarrow/ipc.pxi
cpp/src/arrow/csv/chunker-test.cc
cpp/src/parquet/column_page.h
cpp/src/parquet/bloom_filter-test.cc
cpp/src/arrow/array/builder_decimal.cc
r/src/symbols.cpp
cpp/src/arrow/io/test-common.h
cpp/src/arrow/util/int-util-test.cc
cpp/src/arrow/python/io.cc
python/pyarrow/hdfs.py
... and 762 more

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[xhochy]

+1, LGTM