9.1.1: LDAPSearchResult iteration fix

• Fixed issue #15: BC break between 9.0 and 9.1 when iterating over
  LDAPSearchResult
  (@thekid)

9.1.0: Closeable search results

• Made LDAPSearchResult implement lang.Closeable - @thekid
• Made library compatible with XP 11 - @thekid
• Simplified iteration code in LDAPSearchResult - @thekid

9.0.0: Drop PHP 5 support

• Implemented xp-framework/rfc#334: Drop PHP 5.6:
  . Heads up: Minimum required PHP version now is PHP 7.0.0
  . Rewrote code base, grouping use statements
  . Rewrote isset(X) ? X : default to X ?? default
  . Converted newinstance to anonymous classes
  (@thekid)

8.1.3: XP10 compatibility

• Made compatible with XP 10 - @thekid

8.1.2: Deref bugfix

• Merged PR #14: Bug: Use correct order of calls - @johannes85

8.1.1: PHP 7.3 fixes, performance

• Fixed issue #13: Warning "continue" targeting switch is equivalent to
  "break" which started occurring in PHP 7.3
  (@thekid)

8.1.0: LDAP_NO_SUCH_OBJECT

• Added peer.ldap.LDAPNoSuchObject exception for LDAP_NO_SUCH_OBJECT
  errors. This is useful when performing searches on subtrees that exist
  in 99.9% of all cases, so we don't check them beforehand. See PR #12
  (@thekid)

8.0.1: PHP 7.2 compatibility

• Fixed compatiblity with PHP 7.2 - @thekid

8.0.0: LDAPClient removal, XP9

• Heads up: Dropped PHP 5.5 support - now requires PHP 5.6 minimum!
  (@thekid)
• Fixed issue #9: Function ldap_sort() is deprecated by implementing
  sorting in userland. See PR #19
  (@thekid)
• Heads up: Removed deprecated peer.ldap.LDAPClient class. Use the
  new peer.ldap.LDAPConnection class introduced with PR #5 in April 2016
  (@thekid)
• Added forward compatibility with XP 9.0.0 - @thekid

7.4.3: NPE fix

• Fixed "lang.NullPointerException (Undefined variable: user)" - @thekid