cc @weswigham

@ferdaber Thank you for submitting this PR!

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If no reviewer appears after a week, a DefinitelyTyped maintainer will review the PR instead.

@ferdaber The Travis CI build failed! Please review the logs for more information.

Once you've pushed the fixes, the build will automatically re-run. Thanks!

@johnnyreilly Travis is failing due to the number of packages changed. The tests are causing an out-of-memory error.

Hmmm not sure what to suggest; this is presumably a (regrettable) limitation of our test infrastructure set-up. Is this straightforward to batch up into a number of smaller PRs?

Or feel free to tweak our test infrastructure!

Not really. The overwhelming majority of the changes is bumping the minimum version of the typings to TS 2.8 which is a necessary change because of how the dt publisher works. Unless you mean create a bunch of PRs that do nothing besides bumping version to 2.8.

Aye, you can bump the dependent packages in separate PRs to work around the memory issue.

Same issue occurred here #26545 and to solve it we had to increase buffer size microsoft/types-publisher#471

I can do that. Going by how many tests were successful before the OOM issue occurred I think two PRs should be sufficient (I can test locally for that). Thanks for the suggestions, y'all!

@ferdaber @Hotell

Current Travis CI errors are not related to microsoft/types-publisher#471 (am I missing something here?):

=== ERRORS ===


Error in react
Error: /home/travis/build/DefinitelyTyped/DefinitelyTyped/types/react/test/index.ts:128:9
ERROR: 128:9  expect  TypeScript@next compile error: 
Type 'Validator<Context>' is not assignable to type 'Validator<string | null | undefined>'.
  Type 'Context' is not assignable to type 'string'.
    at /home/travis/build/DefinitelyTyped/DefinitelyTyped/node_modules/dtslint/bin/index.js:103:19
    at Generator.next (<anonymous>)
    at fulfilled (/home/travis/build/DefinitelyTyped/DefinitelyTyped/node_modules/dtslint/bin/index.js:5:58)
    at <anonymous>


Error in recompose
Error: /home/travis/build/DefinitelyTyped/DefinitelyTyped/types/recompose/recompose-tests.tsx:255:33
ERROR: 255:33  expect  TypeScript@next compile error: 
Argument of type 'StatelessComponent<InnerProps>' is not assignable to parameter of type 'ComponentType<OutterProps & { count: number; } & { setCount: (state: number) => number; }>'.
  Type 'StatelessComponent<InnerProps>' is not assignable to type 'StatelessComponent<OutterProps & { count: number; } & { setCount: (state: number) => number; }>'.
    Type 'InnerProps' is not assignable to type 'OutterProps & { count: number; } & { setCount: (state: number) => number; }'.
      Type 'InnerProps' is not assignable to type 'OutterProps'.
        Property 'title' is missing in type 'InnerProps'.
    at /home/travis/build/DefinitelyTyped/DefinitelyTyped/node_modules/dtslint/bin/index.js:103:19
    at Generator.next (<anonymous>)
    at fulfilled (/home/travis/build/DefinitelyTyped/DefinitelyTyped/node_modules/dtslint/bin/index.js:5:58)
    at <anonymous>
Error: The following packages had errors: react, recompose
    at /home/travis/build/DefinitelyTyped/DefinitelyTyped/node_modules/types-publisher/src/tester/test-runner.ts:121:8
    at Generator.next (<anonymous>)
    at fulfilled (/home/travis/build/DefinitelyTyped/DefinitelyTyped/node_modules/types-publisher/bin/tester/test-runner.js:4:58)
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:188:7)

npm ERR! Test failed.  See above for more details.


The command "npm test" exited with 1.

You're right! I was wondering where the recompose errors went... Regardless I'm going to close this PR when I next work on it and split it otherwise I won't be able to see the actual errors before Travis poops the bed.

@ferdaber can we add

type StrictifyFunctions<T> = {
  [K in keyof T]: T[K] extends (...args: infer A) => infer R
    ? (...a: A) => R
    : T[K] extends Object ? StrictifyFunctions<T[K]> : T[K]
};

..... StrictifyFunctions<Defaultize<TProps, D>>

This addes correct variance checking for methods.
See microsoft/TypeScript#25451

@goloveychuk forcing strict variance checking on every react consumer is a big break. I wouldn't do it as the same time as this addition.

@ferdaber I haven't seen anything from you in a while and this PR currently has problems that prevent it from being merged. The PR will be closed tomorrow if there aren't new commits to fix the issues.

@ferdaber To keep things tidy, we have to close PRs that aren't mergeable but don't have activity from their author. No worries, though - please open a new PR if you'd like to continue with this change. Thank you!