Release 1.21

• fix: backward compatibility and UI improvements
• fix: resolve ECDSA certificate path lookup for acme.sh _ecc directory

Release 1.20

• Merge develop: acme.sh migration, DNS-01 support, HTTP-01 fixes
• Merge pull request #11 from mikopbx/develop
• Merge pull request #10 from mikopbx/develop
• Merge pull request #8 from mikopbx/develop
• Merge pull request #7 from mikopbx/develop
• Merge pull request #3 from mikopbx/develop

Release 1.19

• Merge pull request #11 from mikopbx/develop
• Merge pull request #10 from mikopbx/develop
• Merge pull request #8 from mikopbx/develop
• Merge pull request #7 from mikopbx/develop
• Merge pull request #3 from mikopbx/develop