Fix typo in README.md

Refactor redeemCode and support a Provider-wide EnrichSessionState method

This is handled globally

i.e. that the token must have a recognized `aud` field.

* Document set_xauthrequest with pass_access_token

Document feature implemented in https://github.com/oauth2-proxy/oauth2-proxy/pull/68

The feature is already decribed in in the nginx example but not clearly
on each respective parameters documentation.

* Update docs/configuration/configuration.md

Co-authored-by: Nick Meves <nick.meves@greenhouse.io>

Co-authored-by: Nick Meves <nick.meves@greenhouse.io>

Fix code coverage reporting on GitHub actions

* simplify github actions workflow

no more GOPATH, update Go to 1.15.x

* add script to install golangci-lint

* drop support for Go 1.14

* check docker build in ci

* update alpine linux to 3.12

* update CHANGELOG

* fix golangci-lint installation

Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>

Add generic Header injectors for upstream request and response headers

Support HTTP method based allowlists

* update go-redis/redis to v8

testify, ginko and gomega have also been updated.

* update changelog

* Update pkg/sessions/redis/redis_store_test.go

Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>

Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>

Rename test directory to testdata

See https://golang.org/cmd/go/#hdr-Test_packages

* Home: Add a brief description of the behavior

I could not find this information anywhere and think it is quite important for understanding how to use and configure the proxy for different use cases.

(Especially the Ajax part is not mentioned anywhere else I believe.)

I tried to keep it general enough so that it won't need updating often yet useful enough to have good value :)

* Update docs/0_index.md

Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>

Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>

* ci: migrate to Github Actions

* ci: optimize on feedback

* ci: run gocov in correct dir

* ci: running after-build script always

* ci: giving test script execute permission

* ci: correct error handling on test script

* ci: more verbose test script

* ci: configure CC_TEST_REPORTER_ID env

* ci: check existence of CC_TEST_REPORT_ID variable, skip if unset

* ci: check existence of CC_TEST_REPORT_ID variable, skip if unset

* update changelog

* Update CHANGELOG.md

Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>

* Fix build

Without the v7 path it builds old version of the project (v3.2.0).

* Update CHANGELOG.md

Update Go to 1.15

* fix import path for v7

find ./ -name "*.go" | xargs sed -i -e 's|"github.com/oauth2-proxy/oauth2-proxy|"github.com/oauth2-proxy/oauth2-proxy/v7|'

* fix module path

* go mod tidy

* fix installation docs

* update CHANGELOG

* Update CHANGELOG.md

Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>

Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>