pcre: robust discovery of dependencies

[SpaceIm]

Specify library name and version: lib/1.0

• I've read the guidelines for contributing.
• I've followed the PEP8 style guides for Python code in the recipes.
• I've used the latest Conan client version.
• I've tried at least one configuration locally with the
  conan-center hook activated.

Rely on cmake_find_package generator to find dependencies

[conan-center-bot]

All green in build 1 (35885d910fd38430a1232117d0ac1349c2adfc38):

• pcre/8.41@:
  All packages built successfully! (All logs)

• pcre/8.44@:
  All packages built successfully! (All logs)