implicit none(type,external) may not support by some fortran compiler

[hgrhgy]

Description

stdlib_linalg_constants.F90 (5) : error #5136: Illegal syntax for IMPLICIT NONE statement.
**implicit none(type,external)**

Some compiler may not support this syntax.
Intel fortran 2017 is used.

Expected Behaviour

MAYBE fixed it, or other suggestions to deal with this issue.

Version of stdlib

v0.7.0

Platform and Architecture

linux

Additional Information

No response

[perazz]

I will mark this as closed, it was addressed by #913.