[160] Fix error when saving member without email or birthday (#185)

src/Entity/MemberDetailsRevision.php

@@ -42,8 +42,8 @@ class MemberDetailsRevision {
     /** @ORM\Column(type="string", length=100) */
     private string $lastName;
 
-    /** @ORM\Column(type="string", length=200) */
-    private string $email;
+    /** @ORM\Column(type="string", length=200, nullable=true) */
+    private ?string $email = null;
 
     /** @ORM\Column(type="string", length=20) */
     private string $phone;
@@ -102,7 +102,7 @@ public function hasChanged(Member $member) {
          || $this->getPostCode() !== $member->getPostCode()
          || $this->getCountry() !== $member->getCountry()
          || $this->getCurrentMembershipStatus() !== $member->getCurrentMembershipStatus()
-         || $this->getDateOfBirth()->format('Ymd') !== $member->getDateOfBirth('Ymd');
+         || $this->getDateOfBirth() !== $member->getDateOfBirth();
     }
 
     public function getId(): ?int { return $this->id; }
@@ -115,7 +115,7 @@ public function getAddress(): string { return $this->address; }
     public function getCity(): string { return $this->city; }
     public function getPhone(): string { return $this->phone; }
     public function getIban(): ?string { return $this->iban; }
-    public function getEmail(): string { return $this->email; }
+    public function getEmail(): ?string { return $this->email; }
     public function getPostCode(): string { return $this->postCode; }
     public function getCountry(): string { return $this->country; }
     public function getDateOfBirth(): ?DateTime { return $this->dateOfBirth; }