Bump numpy 1.12.4 for support apple M1 chip

[a49a]

I have run PythonInterpreterTest class successful.
I want to bump beam in PyFlink, but pemja depends on numpy==1.19.5.

The conflict is caused by:
   apache-flink 1.15.dev0 depends on numpy>=1.21.4
   apache-beam 2.36.0 depends on numpy<1.22.0 and >=1.14.3
   pemja 0.1.2 depends on numpy==1.19.5

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[maver1ck]

@HuangXingBo Is it possible to merge this also to 0.1 branch?

[HuangXingBo]

@maver1ck Thanks for the reminder. I have released pemja 0.1.5 including this patch.