Release Gridap 0.18

[JordiManyer]

This PR is meant to accumulate all final changes for 0.18.

Compatible branches for our plugins:

• GridapDistributed#ode-refactor, see PR
• GridapGmsh#ode-refactor see PR
• GridapPETSc#ode-refactor see PR
• GridapP4est#ode-refactor see PR
• [...] I do not have access to other packages

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 44.44444% with 20 lines in your changes are missing coverage. Please review.

Project coverage is 87.50%. Comparing base (4cf9e8a) to head (1a51138).

Files	Patch %	Lines
src/FESpaces/Assemblers.jl	0.00%	14 Missing ⚠️
src/MultiField/MultiFieldFESpaces.jl	57.14%	6 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #985      +/-   ##
==========================================
- Coverage   87.60%   87.50%   -0.11%     
==========================================
  Files         176      176              
  Lines       21947    21971      +24     
==========================================
- Hits        19226    19225       -1     
- Misses       2721     2746      +25     

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[fverdugo]

Hi @JordiManyer I see you labeled this PR as "breaking". The most substantial changes seem to be in the ODE module. Are there other significant changes in other modules? (in addition to the ones that I can already see in NEWS.md)

[JordiManyer]

Hi @JordiManyer I see you labeled this PR as "breaking". The most substantial changes seem to be in the ODE module. Are there other significant changes in other modules? (in addition to the ones that I can already see in NEWS.md)

Hi @fverdugo . No, all changes should be documented in NEWS. The most substantial change is the ODEs module, and I've tried to include all breaking issues that were left in milestone 0.18 (i.e the Statistics.jl name clash and the deprecation of SubVector). Other than that, no other major changes since 0.17.23.

[JordiManyer]

@fverdugo @santiagobadia @amartinhuertas The release is ready from our side. Any final comments, or can I start merging?