build: require CMake 3.20 for WASM tests

Align the standalone WASM test configuration with the project minimum.
Validated configuration, build, and tests using Emscripten 6.0.9.

Signed-off-by: Eduardo Silva <edsiper@gmail.com>

build: bump to v1.8.7

Signed-off-by: Eduardo Silva <eduardo@chronosphere.io>

build: bump to v1.8.6

Signed-off-by: Eduardo Silva <eduardo@chronosphere.io>

build: bump to v1.8.5

Signed-off-by: Eduardo Silva <eduardo@chronosphere.io>

build: bump to v1.8.4

Signed-off-by: Eduardo Silva <eduardo@calyptia.com>

build: bump to v1.8.3 and requires CMake v3.20

Signed-off-by: Eduardo Silva <eduardo@calyptia.com>

build: bump to v1.8.2

Signed-off-by: Eduardo Silva <eduardo@calyptia.com>

server: http: cleanup

Signed-off-by: Eduardo Silva <eduardo@calyptia.com>

core: event: Fix typo in mk_event_select.c. (#410)

Signed-off-by: Igor Peshansky <igorp@google.com>

headers: fix license on old files

Signed-off-by: Eduardo Silva <eduardo@calyptia.com>