v2.6.0

JLSO v2.6.0

Diff since v2.5.0

Closed issues:

• Broken example in documentation, breakfast.jlso not found. (#100)
• CI doctest failures (#102)
• Should JLSOFile have get, get!, keys and haskey methods (#107)

Merged pull requests:

• Switch to using strict=true and @example (#101) (@rofinn)
• Restrict doctests to Julia 1.5 (#103) (@mjram0s)
• Add some methods to make JLSOFile more Dict-like (#108) (@nickrobinson251)