Upgrade CoreLibs to 1.2.121

[vityevato]

Changelog:

• [Feature] Add the $csp modifier support: Add $genericblock modifier support #15
• [Feature] Use uniform approach for the passing IP address: Match AdGuardLoginHelper.app Icon to new main AdGuard.app Icon (AppIcon.icns) #561
• [Fix] Do not apply stealth mode to non-browser apps requests: Too many AdGuard Extra userscripts after update #607
• [Fix] Don't crash when CoreLibs init is called when CoreLibs is already initialized: AdGuard Popup Blocker should be enabled by default #608
• [Fix] Crash in AGProxyServer::stop(): Error loading extension encoded with 'UTF-8 with BOM' #610
• [Fix] Crash in the adg_proxy_add_kernel_rules: NSPOSIXErrorDomain: 1 #602
• [Fix] Crash in the onNewConnection_cb: Vivaldi browser doesn't offer to remember username and password on websites. #603
• [Fix] Hide referer from third-parties option working incorrectly: Disconnecting from Ethernet while your Mac is in sleep mode results in AdGuard being unable to filter local content #599
• [Fix] Proxied plain http requests for injection hosts are not being redirected to local server: AdGuard blocking/preventing delivery of outgoing email #600
• [Fix] RemoteEndPoint is empty for the SSL exceptions in the RequestProcessed event: Update CoreLibs to 1.4.138 #579
• [Fix] The responses after the connection was blocked mustn't invoke the RequestProcessed event: Unable to whitelist a website in Safari Tech Preview #580