Legacy_Upgrades::upgrade( string $legacy_db_version )

	public function upgrade( $legacy_db_version ) {
		$last_legacy_db_version = '1.0.10';

		if ( $legacy_db_version === $last_legacy_db_version ) {
			return;
		}

		require_once ABSPATH . 'wp-admin/includes/upgrade.php';

		if ( version_compare( $legacy_db_version, '1.0.3', '<' ) ) {
			$this->upgrade_to_1_0_3();
			$this->update_db_version( '1.0.3' );
		}

		if ( version_compare( $legacy_db_version, '1.0.4', '<' ) ) {
			$this->upgrade_to_1_0_4();
			$this->update_db_version( '1.0.4' );
		}

		if ( version_compare( $legacy_db_version, '1.0.5', '<' ) ) {
			$this->upgrade_to_1_0_5();
			$this->update_db_version( '1.0.5' );
		}

		if ( version_compare( $legacy_db_version, '1.0.6', '<' ) ) {
			$this->upgrade_to_1_0_6();
			$this->update_db_version( '1.0.6' );
		}

		if ( version_compare( $legacy_db_version, '1.0.7', '<' ) ) {
			$this->upgrade_to_1_0_7();
			$this->update_db_version( '1.0.7' );
		}

		if ( version_compare( $legacy_db_version, '1.0.8', '<' ) ) {
			$this->upgrade_to_1_0_8();
			$this->update_db_version( '1.0.8' );
		}

		if ( version_compare( $legacy_db_version, '1.0.9', '<' ) ) {
			$this->upgrade_to_1_0_9();
			$this->update_db_version( '1.0.9' );
		}

		if ( version_compare( $legacy_db_version, '1.0.10', '<' ) ) {
			$this->upgrade_to_1_0_10();
			$this->update_db_version( '1.0.10' );
		}
	}