Merge branch 'JuliaReducePkg:master' into master

fixed REDUCE precompilation

Add .deepsource.toml

Update: .github/mergeable.yml: Punctuation fix.

Update mergeable.yml: Correct mispasted text.

Update .gitattributes: Additional exclusions.

Add .gitattributes: Disable GitHub Linguist.

multi: Redirect all reports/PRs/issues upstream.

Add: .github/issue-close-app.yml: Redirect issues
Add: .github/mergeable.yml: Redirect pull requests
Add: ./SECURITY.md: Redirect vulnerability reports

transitioned to Julia 1.0 release

updated documentation links

updated testing

updated README.md

added Reduce and ReduceLinAlg

generated ReduceAlgebra.jl)

Initial commit